“海洋科学技术的一场革命”指的是什么？

阅读理解

    Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big.

And they can eat small animals. One famous meat-eating plant is the Venus flytrap (捕蝇草).

    The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like

the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs.

If a fly touches one of the hairs, the leaf closes quickly. The fly cannot get out. In about half an hour, the

leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly.

    Why do plants do it? Most plants get what they need from the sun, the air, and the ground. In some

places, the ground is very poor. It doesn't have all these important things, especially nitrogen (氮).

Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let's hope that some

of the bigger plants don't get the same idea!

1. The Venus flytrap is a kind of______.

A. plant            

B. animal          

C. food      

D. meat

2. The Venus flytrap grows in______.

A. most parts of the world                  

B. some parts of Africa

C. dry parts of the United States            

D. wet parts of England

3. From the passage,we learn that______.

A. all plants can eat people                

B. all plants can eat animals

C. some plants can eat people              

D. some plants can eat animals

4. The underlined word"presses"probably means______ in Chinese.

A. 挤压            

B. 关上            

C. 打开        

D. 松开

5. —Why do some plants eat animal meat?

    —Because______.

A. plants are dangerous to animals

B. animals are dangerous to plants

C. plants want to get what they need from animal meat

D. plants want to protect themselves against animals

什么叫掘进工作面正规循环作业？标准是什么？

（）是提出社会主义实质问题的第一人。

A、马克思

B、恩格斯

C、列宁

D、斯大林

导爆管网路中不得有死结，孔内不得有（）。