填空题

Miss Rogers taught physics in a New York school. Last month she was (1) to one of her classes about sound, and she (2) to test them to see how successful she had been in her lecture. She said to them, "Now, I have a brother in Los Angeles. If I was calling him (3) , and at the same time you were 75 feet away, listening to me from across the street, which of you would hear what I said earlier, my brother or you, and for what reason"
The smartest student (4) answered, "Your brother, Miss Rogers, because (5) travels faster than sound waves. "That’s very good, " Miss Rogers answered; but then one of the girls raised her hand, and Miss Rogers said, "Yes, Debbie" "I (6) , " Debbie said. "Your brother would hear you earlier because when it’s eleven o’clock here, it’s only eight o’clock in Los Angeles. \

【参考答案】

explaining

<上一题目录下一题>

热门试题

单项选择题

A. The receptionist
B. The hotel manager
C. The service maid
D. The operator

单项选择题

The United States has many different kinds of climates. On the west coast the temperature changes very little between summer and winter, but the north central states have a very different kind of climate. In those states, people wear light clothing during the summer, and they need heavy wool or fur clothing in the winter.In the eastern part of the United States, summer temperatures are very different from winter temperatures. Summers are usually hot, winters are usually cold. Spring temperatures are comfortably warm, and autumn temperatures are pleasantly cool.Years ago, people in the cold parts of the United States didn’t often get fresh vegetables and fruits during the winter. Today, however, trucks and trains deliver fruit and vegetables very efficiently to all parts of the United States. In this way, Americans send their climates to people in other states.（）

A. The climate varies a little all over the United States.
B. The climate varies a lot in the United States.
C. There is no variation in climate in the United States.
D. The climate is very pleasant all the year round.