问题 单项选择题

用下列两种方法:

①使温度T1的高温热源的温度升高△T;

②使温度T2的低温热源的温度降低相同的△T值。

分别可使卡诺循环的效率升高△η1和△η2,两者相比()。

A.△η1>△η2

B.△η2>△η1

C.△η1=△η2

D.无法确定哪个大

答案

参考答案:B

阅读理解

阅读下面短文,根据短文内容,完成小题。

(1)Daniel(丹尼尔)  was always making excuses for forgetting to do things. His usual excuse was: “I was too busy.” or “I didn’t have time.”

Daniel’s parents were worried about him. “He shouldn’t make so many excuses.” his father said. “No one will believe him.”

(2) “I don’t know what we can do.” his mother said.

“I have an idea” his father said. “If this doesn’t work, nothing will.”

The next day was Daniel’s birthday. He wanted to get exciting presents from his parents. But all day they only said “Good morning, Daniel. Hurry, or you will be late for school.” There were no presents, not even a card. He was really sorry.

“Never mind.” he thought. “There is a surprising present for me after school.” But there wasn’t. Sadly he said to his parents at dinner, (3) ________(今天是我的生日).”

“Oh,” his father said. “So it is. I forgot.”

“So did I.” his mother said.

“How could you forget?” “We have a really good excuse for forgetting your birthday, Daniel. We didn’t remember your birthday because we were too busy.”

Poor Daniel! He never had an excuse for not doing something again.

小题1:请把(1)处译成汉语。 _________________________________________________________。

小题2:请把(2)改成同义句。(用两个词)I don’t know what ______ ______.

小题3:请把(3)处译成英语______________________________________.

小题4:Did Daniel get his birthday present at last?

____________________________________________________________________________.

小题5:What do you learn from the story? _________________________________________.

填空题