问题 填空题

振幅一定的发声体,人离得越近,感觉到的响度就______;当人与发声体距离一定时,发声体的越小,响度就越大;人在野外喊叫时,为了减小声音的分散,常把双手合拢做成喇叭状围在口边,这是为了增大声音的______.

答案

振幅一定的发声体,人离得越近,感觉到的响度就越大;

当人与发声体距离一定时,发声体的越小,响度就越大;

人在野外喊叫时,为了减小声音的分散,常把双手合拢做成喇叭状围在口边,这是为了增大声音的响度;

故答案为:越大,响度.

阅读理解

阅读理解。

     Do you now that animals have love for each other and their children just like us humans? Let me tell you

some moving stories of great animal parents.

     Several years ago a heavy rain hit a town and made the river go up. When the rain stopped, people found

that a dog swam to an island in the river twice a day for two weeks. Why did she do so? Her four children

were there. The mother swam there every day to feed her babies. This true story moved many people.

     Another story is about chimpanzees (猩猩). A scientist named Jane Goodall spent 4 years living with

chimpanzees in Africa. She found that chimpanzees also cared for those that were hurt or got lost. "It is not

only humans who have duties, animals also do," she said.

    Two birds in Chengdu also showed their parental (父母的) love. Their baby was hurt and fell on the street

in the center of the city. Cars were driving past but the brave parents rushed down to the road and took the

little bird away with their claws (爪子).

1. After the heavy rain, the mother dog swam to the island ________.

A. to look for food

B. to feed her babies

C. to move some people

D. to carry things to her owner

2. The scientist found chimpanzees ________.

A. cared for the hurt or lost ones

B. often left for a far place

C. always stayed in the same place

D. didn't care about each other

3. The two birds rushed down and took the little one away because ________.

A. they didn't like their baby

B. they were not kind enough

C. they wanted to teach their baby

D. they wanted to save their baby

4. From the passage we know ________.

A. dogs like to swim across the river in a heavy rain

B. mother birds don't want to save their children

C. animal parents love their children a lot

D. all animals want to move people very much

单项选择题