问题 填空题

已知一个小灯泡两端的电压为3V,通过它的电流为0.5A,经过5min电流所做的功为______J,灯泡消耗的电能为______J.

答案

①W=UIt,

W=3V×0.5A×300S=450J;

②灯泡为纯电阻电路,灯泡消耗电能与电流做功大小相等,所以大小也为450J.

故答案为:450J,450J;

阅读理解

The film of this week is Life of Pi. Pi has been raised in a zoo in India. When his father decides to move the family to Canada and sell the animals to American zoos, they get on a Japanese ship. The ship sinks, and 16-year-old Pi finds himself alone on a lifeboat with a hyena, an orangutan, a zebra, and a tiger.

Soon, there’s only Pi and the tiger. They spend 227 days in the Pacific Ocean. Pi’s fear, knowledge, and wisdom keep him alive. Finally, they reach the coast of Mexico, where the tiger disappears into the jungle. The Japanese who question Pi don’t believe his story, so he tells a second one --- more normal, less interesting. But is it truer?

The film is really touching, meaningful and unusual. It’s also a story, as some audiences say, to “make you believe in God.”

小题1:Pi’s family get on a Japanese ship, because     .

A.his father wants to move to Canada.

B.his father wants to move to America.

C.his father decides to sell animals to American zoos.

D.his father wants to move to Canada and sell animals to American zoos.小题2:After the ship sinks, Pi finds himself staying with     .

A.his father

B.his family

C.some animals including a tiger

D.some Japanese小题3:What makes Pi go through 227 days with the tiger?

A.The Pacific Ocean.

B.The coast of the Mexico.

C.The jungle.

D.His knowledge, cleverness as well as his fear.小题4:What do you think of Pi?

A.honest

B.clever

C.timid

D.impatient小题5:Which of the following statements is true about the film?

A.The Japanese believe Pi’s story.

B.The film is an ordinary one.

C.The film makes people believe in God.

D.Pi tells a second story, which is truer.

单项选择题