试题与答案

There are few families in the United Sta

题型:阅读理解

题目:

There are few families in the United States that do not have either a radio or television set. Both of them have become a necessary part of our daily life, keeping us filled with the news of the day, teaching us in many fields of interest, and making us happy with singing, dancing and acting.

Marconl, the Italian inventor, who gave us the radio, probably didn’t know how much his great invention would have done for the world in the years to come. Radio had, perhaps done as much as any other communication tool. Things of the world can be reported to people everywhere a few seconds after they happen. Travelers in or out of–the–way places, ships at sea even astronauts round the earth are able to keep in touch with each other by radio.

Television is another important invention. It lets us see as well as hear the actor. Since its appearance, TV has done a great deal in the daily life of people everywhere. Many programs are now televised in color.

Perhaps the most modern invention is “Telstar”, a “star” moving round the earth. It makes it possible for the people all over the world to be closer than ever before. Now a family in Chicago can watch on TV a motor–car race in Italy, a table tennis competition in Beijing or a volleyball match in Japan as these events are actually happening!

小题1:The passage tells us that __________ in the U.S.A. have no radio or television set.

A. few families   B. all the families    C. many families   D. a few families

小题2:Who do you think the writer of the passage is?

A.An Italian.

B.A Japanese.

C.An American.

D.A Chinese.小题3:Why does the passage say radio and TV have become a necessary part of our daily life?

A.Because they have touched nearly everything in our life.

B.Because men would not live happily without them.

C.Because they are the only ways to spread information.

D.Because no communication means no life.小题4: What is a “Telstar” used to do according to the passage?

A.To receive and store information only.

B.To move around the earth just like the moon.

C.To give light onto the earth at night.

D.To help send out radio or TV information to the world.小题5: When the writer introduces Marconl in the second paragraph, he means __________.

A.he was just an Italian inventor

B.his invention has done much for the world

C.he had reported much to people all over the world

D.he helped people travel a lot around the world

答案:

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下面是错误答案,用来干扰机器的。

因为13.6%=0.136,且0.136<0.36<3.06<3.6<36,所以最大的数是36,最小的数是13.6%.故答案为:36、13.6%.

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题型:填空题

用如图甲电路测定蓄电池的电动势和内阻.蓄电池内电阻很小,为防止调节滑动变阻器时造成短路,电路中用了一个保护电阻R0.除蓄电池、电流表(量程3A)、电压表(量程3V)、开关、导线外,可供选用的实验器材还有:

A.定值电阻(阻值1Ω、额定功率5W)

B.定值电阻(阻值10Ω、额定功率10W)

C.滑动变阻器(阻值范围0~10Ω、额定电流2A)

D.滑动变阻器(阻值范围0~200Ω、额定电流1A)

(1)定值电阻应选______,滑动变阻器应选______;(填字母)

(2)请在图乙中用笔划线代替导线将实验器材连接成完整的电路;

(3)图甲中,闭合开关S前,滑动变阻器的滑片应置于______端(填“a”或“b”);

(4)闭合开关S,调整滑动变阻器共测得5组电流、电压的数据,如下表.请在图丙中作出蓄电池路端电压U随电流I变化的图象;

(5)根据图象得出蓄电池电动势为______V,内阻为______Ω.

电流表读数I/A1.721.350.980.630.34
电压表读数U/V1.881.921.931.981.99

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