第一篇：初二物理 光的反射 練習(xí)題精選含答案

初二物理 光的反射 練習(xí)題含答案

一、填空題（每空1分，共23分）

1.光的直線傳播是有條件的，它的條件是，光只有在___________才能沿直線傳播。光在不同的物質(zhì)中的傳播速度不相同，只有在__________速度才最大，其大小為__________千米/秒。2.光是直線傳播的。___ _______成像證明了光的直線傳播特性，小孔所成的 像是_______ _______像，因此它可以用光屏接收到，接收到的像一 定是______的。

3.當(dāng)光從一種物質(zhì)向另一種不同的物質(zhì)傳播時，當(dāng)?shù)竭_(dá)兩種傳播物質(zhì)的分界面時，會返回到原來傳播的物質(zhì)中，這種現(xiàn)象叫做光的________，在這種現(xiàn)象中光所遵循規(guī)律是___________定律。4.如圖5—1所示，為一束反射光線，反射線OA與平面鏡之間的夾角為30°角，如果使反射線繼續(xù)向平面鏡方向靠攏時，必須使入射線____________法線。

5.由于光的直線傳播，當(dāng)太陽、月亮和地球三者在同一條直線上時，月亮恰好 位于太陽和地球的連線上，在地球上就可以看到_________，這時地球上的部分 地區(qū)則位于月亮的___________。

6.鏡面反射和漫反射的不同，是由于反射面的結(jié)構(gòu)所造成的。當(dāng)反射面極為光滑時，將發(fā)生________反射，當(dāng)反射面粗糙不平時，則會發(fā)生_________反射。

7.一束光線照在水平放置的平面鏡上，光線向下與水平方向成30°角，在入射線不變時，轉(zhuǎn)動鏡面使反射光線豎直向上，入射線與鏡面間成______角。

8.如果有人以1米/秒的速度遠(yuǎn)離直立的平面鏡時，像向________方向移動，相對于鏡面的移動速度是________米/秒，人與像的相對速度是_________米/秒。

9.太陽能的利用，目前已經(jīng)很普遍了，它所常用的光學(xué)元件是_______鏡，這種鏡能集中日光能的原因是它能使光________，它把光能轉(zhuǎn)化為_______能。

10.汽車的駕駛室的外面都裝有觀察鏡，這種鏡是______鏡，這樣做可以______，該鏡中所成的像是______________。

二、選擇題（把正確答案的序號填在題后的括號內(nèi)）（25分）1.在光的傳播過程中，正確說法是: ［ ］ A.光在一種均勻物質(zhì)中傳播時，一定能直線傳播

B.光只有在真空中傳播時，速度才會最大，它是物體運動速度的最大值 C.光是由無數(shù)條光在傳播時的細(xì)線組成的

D.光從一種均勻物質(zhì)進(jìn)入另一種均勻物質(zhì)時，也可以直線傳播，只是傳播的速度發(fā)生了改變 2.鏡面反射和漫反射是日常所常見兩種反射，在這兩種反射中的共同點在于［ ］ A.都可以把入射的平行光反射成平行光

B.都可以使反射光在人的視覺里得到感覺，且感覺到強(qiáng)度相同 C.兩種反射都是由于光傳播到兩種物質(zhì)的分界面上產(chǎn)生的

3.一束入射光線沿與鏡面成30°角的方向射到平面鏡上，如果使光的傳播方向不發(fā)生改變，應(yīng)該采用的方法是 ［ ］

A.使光線向鏡面偏轉(zhuǎn)30°角 B.使光線向鏡面偏轉(zhuǎn)60°角 C.使鏡面向與光線夾角較小的方向偏轉(zhuǎn)30°角 D.使鏡面向與光線夾角較大的方向偏轉(zhuǎn)120°角

4.人站在平面鏡前，能看到鏡內(nèi)他的全身像和周圍的景物的像，當(dāng)人后退時［ ］ A.他在平面鏡中觀察的視野變小，他的像也變小

B.他在平面鏡中看到景物范圍，視野范圍變大，他的像也變大 C.他在平面鏡中的視野變大，像的大小保持不變

D.他在平面鏡中的視野變小，觀察到的景物減少，他在鏡中所成的像保持不變 5.當(dāng)平行光射到反射鏡上后，反射光線不能匯聚的鏡是 ［ ］

A.平面鏡 B.凸鏡 C.凹鏡 D.三個鏡的反射光都是發(fā)散的

三、作圖題（24分）

1.完成各圖中光反射的光路圖。

2.根據(jù)平面鏡的成像規(guī)律畫出圖5—4中點S和箭頭AB所成的像。

3.圖5—5中的箱子是光進(jìn)入箱中，然后又從箱中反射出來的光路圖，按它們 的光的傳播規(guī)律，把適當(dāng)?shù)墓鈱W(xué)器件填入箱內(nèi)。

四、判斷題（正確的打“√”，錯的打“×”）（18分）1.光從一種物質(zhì)進(jìn)入另一種物質(zhì)時，也可以直線傳播。［ ］ 2.樹在水中的倒立影，是由于水對光的反射而成的像。［ ］ 3.平面鏡所成的像與鏡的大小有關(guān)，鏡大像也大。［ ］ 4.漫反射是由于光的雜亂射入造成的。［ ］

5.光的反射必須發(fā)生在兩種物質(zhì)的分界面處,只要有分界面存在，都會發(fā)生光的反射。6.平面鏡和凹鏡都能成實像。［ ］ 7.凸鏡所成的像都是虛像。［ ］

8.凸鏡和凹鏡都能成像，所以它們都可以使光會聚。［ ］ 9.在任何的反射鏡中，光路都是可逆的。［ ］

五、計算題（10分）

1.用激光反射器向月球發(fā)射激光信號，經(jīng)過2.56秒在地面接收到返回的

激光信號，則這時月球與地球之間的距離是多少？

2.電線桿在陽光照射下的影長為7米，1根長1米的直立細(xì)桿的影長是1.2米，求電線桿的高是多少？

］ ［ 答 案

一、（每空1分，共23分）

1．同一種均勻物質(zhì)中，真空中傳播3x106；2.小孔，實，倒立；3.反射，光的反射； 4.遠(yuǎn)離；5.日食，影中；6.鏡面，漫；7．60o8.遠(yuǎn)離鏡面1米/秒，2米/秒； 9.凹鏡，會聚，熱；10.凸鏡，擴(kuò)大視野，正立縮小虛像。

二、（25分）1.ABD 2.C 3.CD 4.D 5.AB

三、（24分，每個圖2分）1.圖5—2

2.圖5—3

3.圖5—4

四、（18分）1.√2.√3.×4.×5.√6.×7.√8.×9.√

五、（每小題5分，共10分）

（公式對3分，結(jié)果對2分）

光的反射練習(xí)

【同步達(dá)綱練習(xí)】

一、選擇題（每題5分，共45分）

1.關(guān)于光的反射定律，某同學(xué)的敘述如下，其中錯誤的是（）A.反射光線跟入射光線和法線在同一平面上 B.反射光線跟入射光線分居在法線的兩側(cè) C.入射角等于反射角

D.入射角為θ，反射角也為θ 2.下列說法中正確的是（）

A.反射光線和入射光線不可能在同一直線上 B.發(fā)生漫反射時就不遵守反射定律了 C.發(fā)生反射時光路是可逆的

D.反射光的速度小于入射光的速度 3.下列說法中錯誤的是（）

A.在光的反射現(xiàn)象中，若入射光線靠近法線，反射光線也靠近法線 B.光線垂直鏡面入射時，反射角是90°

C.通過平面鏡，甲同學(xué)能看到乙同學(xué)，那么乙也能通過平面鏡看到甲 D.鏡面反射遵守反射定律，漫反射也遵守反射定律

4.若一束平行光垂直射到一平面鏡上，這時反射光和入射光的夾角是（）A.0°

B.90°

C.45°

D.180°

5.若反射光線與入射光線的夾角是80°，則入射光線和鏡面的夾角是（）A.40°

B.50°

C.80°

D.130°

6.入射光線與平面鏡的夾角是55°，保持入射光線不動，繞入射點轉(zhuǎn)動面鏡，使入射角增大10°，則反射光線跟入射光線的夾角是（）

A.50°

B.70°

C.90°

D.130°

7.如左下圖所示，入射光線與平面鏡MN的夾角是30°，如果保持入射光線不動，使平面鏡繞入射點逆時針轉(zhuǎn)動10°，則反射光線跟入射光線的夾角（）

A.增大20°

B.增大10°

C.減小20°

D.減小10°

8.如中上圖所示，兩平面鏡A和B相交成角a，若入射光線跟B鏡面平行，經(jīng)鏡面反射后，射出的光線與A平行，則角a為（）

A.30°

B.60°

C.45°

D.90°

9.如右上圖所示，兩塊平面鏡相交成60°，一束光線AO射到平面鏡M上，要使最后反射回去的光線與AO重合，但方向與AO相反，那么光線AO與平面鏡M的夾角應(yīng)是（）

A.15°

B.30°

C.45°

D.60°

二、作圖題（每1題6分，第2題5分，共11分）

10.在下圖中，根據(jù)題中給出的條件，畫出入射光線、反射光線或平面鏡的位置.11.太陽光線與水平面成30°角，若要用鏡子將太陽光線反射到豎直的深井里，鏡面應(yīng)與水平成多大角度？請在下圖中畫出其光路圖.三、境空題（每空5.5分，共44分）

12.入射光線垂直射到平面鏡上時，反射角是 如果把鏡面轉(zhuǎn)動30°角，這時反射光線跟入射光線的夾角是.13.我國有一部古書《淮南萬畢術(shù)》，書中記有這樣一段文字：“取大鏡高懸，置水盆于其下，則見四鄰??”這是利用 原理來觀察周圍景物，且類似于__________的裝置.14.光的反射有 反射和 反射.兩種反射都遵守 定律.【素質(zhì)優(yōu)化訓(xùn)練】

1.太陽光與水平地面成50°角入射，要使太陽光沿檢查井照亮下水道，如下圖所示，在井口處應(yīng)怎樣放置平面鏡.2.太陽光與水平方向成60°角射向平面鏡，若使反射光線沿水平方向射出，求平面鏡與水平方向夾角

【生活實際運用】

1.鐵板做成的公益廣告牌上用油漆畫上圖案和文字.人們從廣告牌前經(jīng)過時卻看不清上面的內(nèi)容，只感到有刺眼的光照來，這是何故？

2.請你設(shè)計一種自行車“尾燈”，當(dāng)光照射在它上面時，它能將光按原方向反射回去.這樣使夜行的機(jī)動車輛能看清公路上的自行車.參考答案

【同步達(dá)綱練習(xí)】

一、1－5．C C B A B 6－9．C C B B

二、10,11

三、12．0° 60° 13．平面鏡成像 潛望鏡 14．鏡面 漫 光的反射 【素質(zhì)優(yōu)化訓(xùn)練】

1．平面鏡應(yīng)與水平面成70°角放置．

2．平面鏡的放法有兩種：一種是鏡面與水平方向成30°角，一種是與水平方向成60°角.【生活實際運用】

1．廣告牌如果太光滑，太陽光照在它上面，就易產(chǎn)生鏡面反射．當(dāng)人逆著反射光看廣告牌時，由于光照太強(qiáng)，分辨不出它上面的字跡，圖案和底色．

2．自行車“尾燈”本身不發(fā)光，設(shè)計反射式尾燈是為了讓車后的燈光照在它上面發(fā)生反射而被人觀察到。將反射面設(shè)計成互成90°角度的組合面可以使先按原路反射回去．

第二篇：初二物理連通器練習(xí)題

1、下列容器中，不是連通器的是（）

A、U形管

B、茶壺

C、鍋爐水位計 D、帕斯卡裂桶實驗

2、關(guān)于連通器的理解正確的（）A、連通器中至少有兩個開口 B、連通器中只有兩個開口

C、在連通器中倒入液體后，各液面一定相平。D、底部互相連通的容器叫連通器

3、如圖所示，A，B兩容器內(nèi)盛著水，水面等高，兩容器間用一斜管相通，K是開關(guān)，當(dāng)K打開后，則（）

A、水將由A流向B B、水將由B流向A C、水不流動 D、無法確定

7、下列關(guān)于茶壺嘴的設(shè)計說法中，正確的是：（）A、壺嘴遠(yuǎn)高于壺口

B、壺嘴遠(yuǎn)低于壺口

C、壺嘴做得與壺口一樣高

D、以上設(shè)計都可以

DACC

1、連通器在日常生活、生產(chǎn)中有著廣泛的應(yīng)用。圖中所示的事例中利用連通器原理的是（）

A．只有（1）（2）

B．只有（3）（4）

C．只有（1）（3）（4）

D．（1）（2）（3（4）

2、在連通器的兩端分別裝有鹽水和清水，液面相平，如圖所示，如果將閥門打開，則（）A.鹽水向右流動

B.清水向左流動

C.均不流動

D.無法判斷

3、下列物體不屬于連通器的是

（）

A.水壺

B.涵洞

C.噴霧器

D.船閘

4、學(xué)校改建操場時，工人師傅用一灌水的透明長塑料管檢查操場是否水平。當(dāng)管中的水靜止時，管兩端的水面一定____________，當(dāng)塑料管的一端提高10cm，最終管兩端水面的高度差為____________。

1．連通器是上端_________，下部_________的容器．往連通器中注入液體，當(dāng)液體不流動時，各容器中的液面將會保持 ．

2．茶壺和鍋爐水位計都是_________．船閘是利用_________的道理來工作的．

3．如圖所示的敞口容器中加水，則水能達(dá)到的最高位置是（）．

A．容器A的頂端 B．容器B的頂端 C．容器C的頂端D．條件不足，無法確定

4．如圖所示，A，B兩容器內(nèi)盛著水，水面等高，兩容器間用一斜管相通，K是開關(guān)，當(dāng)K打開后，則（）

A．水將由A流向B B．水將由B流向A

C．水不流動 D．無法確定

5．圖中正確的是（）．

６．如圖所示，求：

（1）箱頂?shù)腁點所受水的壓強(qiáng)；

（2）若箱蓋面積為15平方厘米，求水對箱蓋的壓力．

７．有一連通器，左右管口口徑相同，先往連通器里倒入一些水，然后在右管中倒入一些油，此時測得如圖所示的基線以上的水柱高度為8厘米，油柱高度為10厘米，問這種油的密度是多少？

答案：

1． 開口，連通，水平 2．連通器，連通器 ３．B ４．C ５．B

６．（1）980帕；（2）l.47牛

7．

第三篇：初二物理速度練習(xí)題

速度練習(xí)題

一、選擇題

1.下列說法正確的是 [

]

A.變速直線運動的速度是變化的B.平均速度即為速度的平均值

C.瞬時速度是物體在某一時刻或在某一位置時的速度

D.瞬時速度可看作時間趨于無窮小時的平均速度

2.關(guān)于勻速直線運動，下列說法中正確的是 [

]

A.瞬時速度不變的運動，一定是勻速直線運動

B.速率不變的運動，一定是勻速直線運動

C.相同時間內(nèi)平均速度相同的運動，一定是勻速直線運動

D.瞬時速度的方向始終不變的運動，一定是勻速直線運動

3.子彈以900m/s的速度從槍筒射出，汽車在北京長安街上行駛，時快時慢，20min行駛了 18km，汽車行駛的速度是54km/h，則 [

]

A.900m/s是平均速度

B.900m/s是瞬時速度

C.54km/h是平均速度

D.54km/h是瞬時速度

4.物體通過兩個連續(xù)相等位移的平均速度分別為v1=10m/s，v2=15m/s，則物體在整個運動過程中的平均速度是 [

]

A.12.5m/s

B.12m/s

C.12.75m/s

D.11.75m/s

5.作變速直線運動的物體，若前一半時間的平均速度為4m/s，后一半時間的平均速度是8m/s，則全程的平均速度是 [

]

A.7m/s

B.5m/s

C.6m/s

D.5.5m/s

6.質(zhì)點作單方向的勻變速直線運動時，下列論述中正確的是 [

]

A.相等的時間內(nèi)位移相等

B.相等的時間內(nèi)位移的變化相等

C.相等的時間內(nèi)速度的變化相等

D.瞬時速度的大小改變，但方向不變

7.下列作直線運動的速度-時間圖象（圖1）中，表示質(zhì)點作勻變速直線運動的是 [

]

8.一學(xué)生在百米賽跑中，測得他在 50m處的瞬時速度為 6m/s，16s末到達(dá)終點的瞬時速度為7.5m/s，則它在全程內(nèi)的平均速度是： [

]

A.6m/s

B.6.25m/s

C.6.75m/s

D.7.0m/s

二、填空題

9.一輛汽車在一條直線上行駛，第1s內(nèi)通過5m，第2s內(nèi)通過20m，第3s內(nèi)通過20m，第4s內(nèi)通過 5m.則此汽車在最初 2s內(nèi)的平均速度是______m/s，中間 2s內(nèi)的平均速度是______m/s，全部時間內(nèi)的平均速度是______m/s.10.勻速直線運動的s-t圖象中的______可表示質(zhì)點運動的快慢，______越大，質(zhì)點運動的速度也越大.11.如圖2（a）中的圖象A表示質(zhì)點作______運動，圖象B表示質(zhì)點作______，圖象C表示質(zhì)點______；在圖（b）中的圖象A表示質(zhì)點作_______，圖象 B表示質(zhì)點作_______，圖象C表示質(zhì)點作_______.三、計算題

12.某運動員在百米跑道上以8m/s的速度跑了80m，然后又以2m/s的速度走了20m，這個運動員通過這段路的平均速度是多少？

13.圖3是甲、乙兩物體的位移和速度圖象.試根據(jù)圖象說明從A→B→C→D的各段時間內(nèi)，甲物體在5s內(nèi)的位移是多少？你能求出乙物體在5s內(nèi)的位移嗎？

速度練習(xí)題答案

一、選擇題

1.ACD 2.A 3.BC 4.B 5.C 6.CD 7.BC 8.B

二、填空題

9.12.5，20，12.5 10.斜率，斜率

11.勻速直線，方向相反勻速直線運動，處于靜止?fàn)顟B(tài)，靜止開始的勻加速直線運動，方向相同的勻減速直線運動，方向相同的勻速直線運動.三、計算題

12.5m/s 13.-2m，16m

第四篇：初二英語完形填空練習(xí)題(含答案)

1、Mark lived in a village far away.One day he became very ill and everyone thought he would 1____

soon.They sent for a doctor.Two days 2_____ the doctor came and looked over the sick man.3____ asked for a pen and some paper to write down the name of the medicine.But there was no pen 4______ paper in the village, because no one could write.The doctor

5_____ up a piece of burnt wood from the fire and wrote the name of the medicine on the 6______ of the house.“ Get this medicine for him.” he said, “and he will soon get 7_____.” Mark’s family and friends did not know

8_____ to do.They could not read the strange words.Then a young man

9_____ an idea.He took off the door of the house, put it on his carriage(馬車)and drove to the nearest 10.He bought the medicine there, and Mark was soon well again.（）1.A.wake B.cry C.moved D.die（）2.A.late

B.later C.ago D.before（）3A.The sick man B.Mark C.The doctor D.The farmer（）4.A.and

B.or

C.then D.also（）5.A.picked B.held C.made D.looked（）6.A.wall

B.window C.ground D.door（）7.A.well

B.worse C.bad D.good（）8.A.when B.what C.where D.whick（）9A.thought B.hit

C.caught D.had（）!0.A.shop B.farm C.hospital D.village

2、Peter and Mike were in 1____ class．Peter was born in a 2_____ family．But Mike’s father was a businessman(商人)and got 3_____ money．When Peter got into trouble(困難)he always helped him．

Peter liked to have sports．He was good at 4_____ ．He ran 5____ than any others in their class It was Sunday．Mike and Peter went to a forest to have a picnic．Mike took a lot of food there．It was a 6___ ay．The birds were singing and there were all kinds of flowers．They ate and drank then went 7___ in the river．They had a good time．Suddenly they heard a great noise．They found it was a tiger behind a big tree．They were both very 8______ ．Peter put on his shoes quickly and was going to run away．Mike stopped him and said：”It’s no use for us．The tiger runs 9____ faster than us．Let’s find a way．”“It doesn’t matter．”said Peter．”I’m 1 0___ I'll run faster than you．”

1．A．same

B．different

C．difference

D．the same 2．A．rich

B．happy

C．poor

D．bad 3．A．many

B．lot

C．a(chǎn)ny

D．much 4．A．ran

B．running

C．run

D．runs 5．A．fast

B．faster

C．fastest

D．best 6．A．sun

B．rain

C．rained

D．sunny 7．A．fish

B．to fishing

C．fishing

D．fished 8．A．happy

B．a(chǎn)fraid

C．sad

D．exciting 9．A．more

B．much

C．many

D．1ittle 10．A．a(chǎn)fraid

B．worried

C．sure

D．glad

3、根據(jù)短文內(nèi)容在A、B、C、D四個選項中選出可以填入空白處的最佳答案（10分）

We were going to play a team from a country school.They didn’t come 1 the match nearly began.They looked 2 than we thought.The wore dirty T-shirts and blue jeans and looked like farm boys.We thought they 3 saw a basketball before.We felt that we didn’t 4 any practice to play with such a team.It was very late so they couldn’t have any time to practice.The match began ,one of our boys 5 the ball and he tried to give it to another one.But from out of nowhere a boy in a T-shirt 6 the ball and he quickly and beautifully got the ball into our basket and had two points.They 7 us.They had another two points in a minute.Soon it was all over.The country team 8 the match.Of course we knew that there was still another team 9 than any good team.But the important lesson we learn this time was : One can’t tell a man or a team by the 10.（）

1、A.when

B.so

C.until

D.at（）

2、A.stronger

B.younger

C.worse

D.better（）

3、A.never

B.often

C.sometimes

D.always（）

4、A.have

B.make

C.use

D.need（）

5、A.got

B.played

C.took

D.carried（）

6、A.caught

B.changed

C.held

D.stopped（）

7、A.surprised

B.frightened

C.admired

D.smiled（）

8、A.lost

B.won

C.got

D.had（）

9、A.worse

B.less

C.better.D more（）

10、A.T-shirt

B.appearance

C.name

D.points

4、初二完形填空練習(xí)題

Mary has some friends.1 Betty, Peter, Alice 2 Mike.Mary is the oldest 3.Betty is thirteen years 4.She is younger than Mary and older than Peter.Alice is nice and Mike is seven.Betty and Peter are 5 runners.But Peter runs faster.Mary and Betty like to 6.Mary plays better than Betty.Alice sings 7 of them.Mary and Betty study in a middle school.Alice and Mike study in a primary school.They 8 work hard at school.But Betty works 9.Her handwriting is good, 10.1.A.They are B.It isC.There are D.We are 2.A.but B.orC.them D.and 3.A.in the five B.of fiveC.of the five D.for the five 4.A.older B.oldC.oldest D.very old 5.A.best B.betterC.well D.good 6.A.play basketball B.play a basketball C.play the basketball D.play basketballs 7.A.good B.betterC.best D.well 8.A.six B.allC.four D.both 9.A.hard B.harderC.very hard D.hardest 10.A.too B.twoC.at D.also

5、Perhaps you have heard _1 __about the Internet, but what is it?

The Internet is many different networks around the world.A network is a group of computers put together.These networks joined together are called the Internet._2 that doesn't sound interesting.But _3 we've joined the Internet, there are 4 things we can do.We can have a lot of 5 on the World Web.(www.tmdps.cning smaller and smaller.People can now work at home with a computer in front, getting and sending the information they need.They can buy or sell whatever they want by the Internet.But do you know 98% of the information is 10 English? So what will English be like tomorrow? 1.A.a lot of

B.a lot

C.a few

D.a little of 2.A.May

B.But

C.And

D.Maybe 3.A.where

B.when

C.however

D.although 4.A.lots of

B.a lot

C.much

D.few 5.A.interesting B.friends C.interest

D.funny 6.A.find

B.look for

C.find out D.look after 7.A.with

B.for

C.on

D.about 8.A.with

B.by

C.on

D.for 9.A.call

B.called

C.calls

D.calling 10.A.on

B.with

C.in

D.for

6、Life in the year 3044 is very different 46 life in the 21st century.We still do many of the things you did, but we do them 47.For example, we now have e-friends to help us and keep us company.An e-friend is a machine that looks just 48 a human being.It can walk and talk and can do almost 49

we human beings do.My e-friend is a lot like me and we have

fun together.She helps me 51 my homework and we often go swimming.She is programmed to take care of me if anything 52 , so I always feel safe when we are together.She can also send me messages, just like old-fashioned e-mail, and I can download information from her memory.It’s great 53 an e-friend – I am never lonely and I always have someone to talk 54.I would like to tell you more about life in the year 3044, but I have to send my e-friend to clean up my room.Maybe 55 I will be able to travel back in time and visit you.46.A.of

B.from

C.in

D.with

47.A.different

B.difference

C.differently

D.differences 48.A.like

B.for

C.at

D.up

49.A.something

B.anything

C.nothing

D.everything 50.A.many

B.a number of

C.a lot of

D.the number of 51.A.with

B.at

C.on

D.doing

52.A.will happen

B.happens

C.happened

D.is going to happen 53.A.have

B.having

C.to have

D.has 54.A.to

B.about

C.with

D.Both A and C

55.A.one day

B.in one day

C.after one day

D.with one day

7、A generous gap(代溝)has become a serious problem.I read a 1 about it in the newspaper.Some children have killed themselves after 2 with parents.I think this is because they don’t often have a talk with each other.Parents now 3 more time in the office, 4

they don’t have much time to stay with their children.As times passes, they both feel that they don’t have the __5 topic(題目)to talk about.I want to tell parents to be more with your 6 , get to know them and 7 them.And for children, show your 8 to your parents.They are the people who love you.So 9 them your thoughts.In this way, you 10 have a better understanding of each other.（）1.A.message

B.call

C.report

D.letter（）2.A.talk

B.argue

C.fight

D.play（）3.A.spend

B.stay

C.work

D.have（）4.A.because

B.if

C.but

D.so（）5.A.interesting

B.same

C.true

D.good（）6.A.business

B.children

C.work

D.office（）7.A.get on well with B.look after

C.understand

D.love（）8.A.interest

B.secret

C.trouble

D.feelings（）9.A.tell

B.ask

C.answer

D.say（）10.A.can

B.should

C.must

D.would

8、Grandma Li lived alone in an old building.She was old and didn’t like noise at all.The young man and woman 46 always made much noise every night, so she couldn’t 47.When the young man and woman moved out of the building, Grandma Li was very 48.Another young man moved in and Grandma Li thought, “Well, he 49.”

But at three o’clock the next morning, when Grandma Li 50 , some noise 51.She 52 carefully.It was a dog.She thought, “There wasn’t any dog here before.It 53 be the young man’s.” She 54 him and telephoned the young man at once.Before the young man could say something, she stopped the call.Nothing more happened 55 four o’clock.Then Grandma Li’s telephone rang.When she answered the phone, she heard, “I’m the man upstairs.I’m sorry to trouble you, but I want to tell you I don’t have a dog at all!” 46.A.upstairs

B.up

C.above

D.higher 47.A.get to sleep

B.sleeps

C.slept

D.falls asleep 48.A.sad

B.pleased

C.surprised

D.worried 49.A.looked quiet

B.looks quiet

C.looked quite

D.looks quite 50.A.was sleeping

B.was falling asleep

C.slept

D.was getting to sleep 51.A.woke her up

B.waked she up

C.woke up her

D.waked up she 52.A.heard

B.listened

C.was hearing

D.listened to 53.A.can

B.may

C.must

D.could 54.A.angry with

B.angrier with

C.is angry with

D.was angry with 55.A.when

B.after

C.at

D.until

9、The difference between life in one country and in

is quite often

the difference between city life and village life in

country.In an

English

everybody

everybody else;they know what time you get up, what time you go to bed and what you usually have

dinner.If you want any help, you will always

it and be glad to help

in return.In a large

city

London, there are many things to see and many places to go to.people often do not know each other.It

happens that you have

seen your next-door neighbor, don’t know his name or

about him.People living in London are often very , particularly.This is because the people who they are with all day are scattered over large areas in the evenings and weekends.you walk

the street in London on a Sunday, it is almost like an empty town.One is

for old people who do not live with their

and have no work to go to during the day.1.A.other

B.others

C.the other

D.another

2.A.not so big as

B.so big as

C.isn’t so big as

D.as big as

3.A.same

B.the same

C.different

D.different

4.A.village

B.town

C.city

D.country

5.A.needs

B.knows

C.helps

D calls

6.A.at

B.for

C.in

D.with

7.A.get

B.take

C.bring

D.pay

8.A.any other

B.any

C.anyone else

D.any people

9.A.like

B.as

C.of

D.in

10.A.So

B.Then

C.Though

D.But

11.A.good

B.well

C.better

D.best

12.A.sometimes

B.some times

C.some time

D.sometime

13.A.ever

B.had

C.never

D.been

14.A.something

B.nothing

C.everything

D.anything

15.A.lonely

B.happy

C.angry

D.tired

16.A.before work B.at work

C.after work

D.by work

17.A.If

B.After

C.Before

D.Because

18.A.in

B.through

C.to

D.across

19.A.lucky

B.happy

C.surprised

D.sorry

20.A.daughters

B.sons

C.children

D.people

10、Have you ever asked yourself why children go to school? You may 1 they go to learn languages, P.E., history, science and all other 2.But why do they learn these things? We send our children to school to prepare them for the time 3 they will grow up and will begin to work for 4.Nearly everything they study at school has some practical use in their life.But is that the 5 reason why they go to school? There is more in education than just 6 facts.We go to school above all to learn how to learn, so that then we have left school we can 7 to learn.A man who really knows how to learn will always be successful, because whenever he has to do something new which he has never had to do 8 he will rapidly teach himself how to do it 9 the best way.The uneducated person, on the other hand, is 10 unable to do something new, or does it badly.The purpose of school, therefore, is not to teach languages, math, geography, etc, but to teach pupils the way to learn.()1.A.speak

B.tell

C.say

D.talk()2.A.matters

B.subjects

C.math

D.physics()3.A.while

B.when

C.which

D.where()4.A.oneself

B.they

C.them

D.themselves()5.A.only

B.nearly

C.lone

D.alone()6.A.study

B.studied

C.learning

D.learn()7.A.make

B.keep

C.keep on

D.go on()8.A.later

B.ago

C.then

D./()9.A.from

B.in

C.with

D.on()10.A.either

B.neither

C.other

D.nor

11．完型填空

Someone says, “Time is money”, but I think time is 1 important than money.Why? Because when money is spent, we can get it back.However, when time is 2 , it’ll never 3.That is 4 we must not waste time.It goes without saying that the 5 is usually limited.Ever a second is very important.We should make full use of our time to 6 useful.But it is a pity that there are a lot of people who do not know the importance of the time.They spent their limited time smoking, drinking and 7.They do not know that wasting time means wasting part of their own 8.In a word, we should save time.We shouldn’t 9 today’s work for tomorrow.Remember we have no time to 10.()1.A.much

B.less

C.mush less D.even more()2.A.cost

B.bought

C.gone

D.finished()3.A.return

B.carry

C.take

D.bring()4.A.what

B.that

C.because

D.why()5.A.money

B.time

C.day

D.food()6.A.nothing B.something C.anything D.everything()7.A.reading B.writing

C.playing

D.working()8.A.time

B.food

C.money

D.life()9.A.stop

B.leave

C.let

D.give()10.A.lose

B.save

C.spend

D.take

1.答案：1 DBCBADABDC

2DCDBBDCBBC

3、CCADA AABCB

4、A D C B D A C B D A

5、答案 1.B 2.D 3.B 4.A 5.C 6.A 7.D 8.B 9.D 10.C

6、答案 II.46-50 BCADC

51-55 ABCDA

7、答案 四．完型填空答案：CBADB BADAD

8、答案 VI.46-50 AABBA 51-55 ABCDD

9、答案 四.DABAB, BACAD, BACDA, CABDC

10、答案 五.1-5 CBBDA

6-10 CDDBA 11、1-5

DCADB 6-10

BCDBA

第五篇：初二物理練習(xí)題聲現(xiàn)象

初二物理練習(xí)題聲現(xiàn)象

地理練習(xí)題

一、選擇題(133分)

1.關(guān)于聲音的產(chǎn)生的說法中正確的是()

A.只有聲帶不停地振動才能發(fā)聲

B.只要人耳聽不到，即使物體在振動也不會發(fā)聲

C.一切正在發(fā)聲的物體都在振動

D.以上說法都不對

2.我國正在進(jìn)行登月計劃的研究，按照計劃，我國將在2007年將嫦娥一號送上月球，宇航員登上月球后，若有一塊隕石落在他附近，則下列判斷正確的是()

A.宇航員能夠聽到隕石撞擊月球的聲音

B.隕石撞擊月球時不會使月球的地面產(chǎn)生振動 C.宇航員雖然不能聽到隕石撞擊月球的聲音，但他可以感受到這個聲音的存在

D.隕石撞擊月球的聲音可以在月球的表面向四周傳播

3.潛水員在不浮出水面的情況下依然可以聽到岸上的談話聲，以下分析不正確的是()

A.空氣可以傳播聲音 B.岸上的人的聲帶在振動

C.水可以傳播聲音 D.潛水員的聲帶在振動

4.為了保護(hù)學(xué)習(xí)的環(huán)境，減少噪聲污染，下列措施不可行的是()

A.不要在教學(xué)區(qū)域內(nèi)大聲喧嘩

B.在校園內(nèi)及其附近栽花種草

C.將教室的所有門窗全部封死

D.教學(xué)樓的內(nèi)外墻面盡量做得粗糙些