Who Would Hear Me First?

Professor Wang is a physics teacher in Beijing.Once she was explaining to one of her classes about sound. She decided to test the students to see how well they had understood her. "I have an uncle in Xinjiang," she said. "Suppose I was calling him on the phone from here. and at the same time you were 25 metres away, listening to me. Who would hear me first, my uncle or you — and for what reason?"

Ma Hua at once answered, "Your uncle, Professor, because sound-waves(声波)travel slower than electricity."

"Good," said the professor. But then another boy raised his hand. "Yes, Limin?" said Professor Wang.

"Of course your uncle would hear you first," Limin said, "but that's because of the time difference. When it's nine o'clock here, it's seven o'clock in Xinjiang."

**填空：**每个空格只准填写一个英语单词，使各句意思与短文内容一

致。

1. In her physics class Professor Wang was teaching her students

about (1) .

1. In her explanations, she told the students that (2) is faster

   than (3) .

2. "Did they (4) me?" she wondered. So she decided to (5)

   her students.

3. Professor Wang was (6) with the first student's answer. 5.Ma

   Hua thought the teacher's (7) over the telephone would

be heard first,though the (8) between our capital and Xinjiang

is much greater.

6.We can be sure that the teacher did not agree with (9) because he gave the wrong (10) , though part of his answer was right.

（附加题）综合填空根据短文内容在每个空格内填写一个英语单词。所填 单词的第一个字母必须与空格内所给的字母一致，不得改动。（本题共 10

分，每个空格 1 分。本题成绩供参考用，不计入总分。）

How does sound travel through air?This is a question that often p (1) people. The answer isn't h (2) to find if you have ever o (3) waves on a river or sea.

T (4) a stone into a pool and see what happens. Try to i (5) what will take place when someone shouts or makes a loud n (6) , and you can get an i (7) of the movement of sound.

The study of sound is one of the things that physics d (8) with. Physics may seem terribly dry and c (9) at times, but a good teacher can make it both i (10) and simple.