问题 问答题

阅读下面短文,回答问题.

    聂利同学在五年级自然课上听老师讲,蜜蜂是靠翅膀的振动发声的,她想抽时间去附近的养蜂场看一看.一天她来到养蜂场,发现箱外聚集在一起的蜜蜂似乎在休息,并没有振动翅膀,可嗡嗡声不绝于耳,后又发现蜜蜂歇在花上,翅膀一动不动,但仍有嗡嗡的声音.她感到很疑惑,难道是老师讲错了吗?她又查了《十万个为什么》.书上清楚地写着:“蜜蜂的嗡嗡声来自翅膀的振动”.她想,难道连专家都搞错了吗?于是她将自己观察到的情况和想法告诉了老师,老师建议她用实验的方法去研究…

    她做了下表中“剪去蜜蜂双翅的实验“,发现蜜蜂的嗡嗡声没有变化.经观察她又发现蜜蜂嗡嗡叫时,蜜蜂双翅根部的两个”小黑点“在鼓动.她猜想:“小黑点”可能就是蜜蜂的发声器官.于是她又做了下表中刺破蜜蜂双翅根部”小黑点“的实验,发现蜜蜂不再发声.(本文摘自《少年科普报》2003年第49期)

实验名称实验总数(只)死亡数(只)发声数量(只)声音大小
剪去蜜蜂双翅的实验826没有变化
刺破蜜蜂双翅根部“小黑点”的实验820没有声音
请简要回答下列问题.

(1)根据聂利同学的实验研究,关于蜜蜂的发声你可得出什么结论?

答:______.

(2)我们从聂利同学的研究过程中可以学到什么?

答:______.

答案

答:(1)实验过程把蜜蜂的翅膀减掉,发现仍有声音,由此判断蜜蜂的发声不是靠翅膀的振动;

当把蜜蜂的小黑点弄破后,不再有声音,由此可知蜜蜂的发声器官是“小黑点”;

(2)学习她尊重事实,不迷信权威,敢于质疑,执着探究,仔细观察,多做实验,多方请教,查阅资料等.

阅读理解

阅读理解。

     It is often necessary to release a fish, that is , set it free after catching, because it is too small,

or you just don't want to take it home to eat. In some cases, releasing fish is a good measure

that will help keep fish variety and build their population size. The Department of Game and

Inland Fisheries (DGIF) encourages fishermen who practice catch-and-release fishing to use

a few simple skills when doing so. The advice provided below will help make sure that the fish

you release will surviveto bite again another day.

     -When catching a fish, play it quickly and keep the fish in the water as much as possible.

Don't' use a net in landing the fish and release it quickly to prevent it from dying.

     -Hold the fish gently. Do not put your fingers in its eyes. Don't wipe the scales (鱼鳞) off

the fish because it might cause it to develop a disease and reduce its chance of survival.

     -Remove your hook quickly. If the hook is too deep or hooked in the stomach, cut the line

and leave the hook in. The hook left inside will cause no serious problem to the fish.

     -Take good care of the fish by moving it gently in water. Release the fish when it begins to

struggle and is able to swim.

     -Do not hold fish in a bucket or some other containers and later decide to release it. If you

are going to release a fish, do so right away.

     With a little care and by following the suggestions given above, you can give the released

fish a better chance of survival.

1. People sometimes set a fish free after catching it because they _________

A. don't want it to die

B. hope it will grow quickly

C. don't want to have it as food

D. want to practice their fishing skills

2. Which of the following will probably make a fish ill?

A. Taking the hook off it.

B. Removing its scales.

C. Touching its eyes.

D. Holding it in your hand.

3. A proper way to release a fish is to _________.

A .move it in water till it can swim

B. take the hook out of its stomach

C. keep it in a bucket for some time

D. let it struggle a little in your hand

4. What is the purpose of the test?

A. To show how to enjoy fishing.

B. To persuade people to fish less often.

C. To encourage people to set fish free.

D. To give advice on how to release fish.

单项选择题