问题 选择题

下面关于声现象的一些叙述,其中正确的是(  )

A.只要物体在振动,我们就一定能够听到声音

B.太空中的宇航员可以直接用语言交流

C.雷声是由于空气振动发声的

D.狗趴在地上睡觉,耳朵贴着地面,很容易发觉人走动,是因为狗的耳朵特别灵敏

答案

A、只有在人耳的听觉频率范围以内的声音,人耳才能够听到,故A错误;

B、真空不能传播声音,故B错误;

C、雷声是由空气振动产生的,故C正确;

D、狗贴着地面容易发觉人走动,是因为固体的传声效果好一些,故D错误.

故选C

阅读理解

There was a gardener who looked after his garden with great care. To water his flowers, he used two buckers. One was a shiny and new bucket. The other was a very old and dilapidated one, which had seen many years of service, but was now past its best.

Every morning, the gardener would fill up the two buckets. Then he would carry them along the path, one on each side, to the flowerbeds. The new bucket was very proud of itself. It could carry a full bucket of water without a single drop spilled (溢出). The old bucket felt very ashamed because of its holes: before it reached the flowerbeds, much water had leaked along the path.

Sometimes the new bucket would say, “See how capable I am! How good it is that the gardener has me to water the flowers every day! I don't know why he still bothers with you. What a waste of space you are!”

And all that the old bucket could say was, “I know I’m not very useful, but I can only do my best. I’m happy that the gardener still finds a little bit of use in me, at least.”

One day, the gardener heard that kind or conversation. After watering the flowers as usual, he said, “You both have done your work very well. Now I am going to carry you back. I want you to look carefully along the path.”

Then the two buckets did so. All along the path, they noticed, on the side where the new bucket was carried, there was just bare (光秃秃的)earth; on the other side where the old bucket was carried, there was a joyous row of wild flowers, leading all the way to the garden.

小题1:What does the underlined word “dilapidated” probably mean?

A.Dirty

B.Dark

C.Worn-out

D.Plain-looking.小题2:What was the old bucket ashamed of?

A.His past.

B.His aging.

C.His manner.

D.His leaking.小题3:The new bucket made conversations with the old one mainly to         

A.laugh at the old one

B.take pity on the old one

C.show off its beautiful looks

D.praise the gardener’s kindness小题4:Why was the old bucket still kept by the gardener?

A.Because it was used to keep a balance

B.Because it stayed in its best condition

C.Because it was taken as a treasure

D.Because it had its own function

单项选择题