问题 问答题 简答题

什么是微震监测法?

答案

参考答案:

微震监测法就是采用微震网络进行现场实时监测,通过提供震源位置和发生时间来确定一个微震事件,并计算释放的能量,进而统计微震活动的强弱和频率,并集合微震事件分布的位置判断潜在的矿山动力灾害活动规律,通过识别矿上动力灾害活动规律实现危险性评估和预警。

单项选择题 A1/A2型题
阅读理解

A new study gives us the warning that about thirty percent of the world's people may not have enough water by the year 2025.

A private American organization called Population Action International did the new study. It says more than three-hundred-thirty-five-million people lack enough water now. The people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.

P-A-I researcher Robert Engelman says by the year 2025, about three-thousand-million people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet the amount of water on Earth stays the same.

Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.

The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking waters not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera, which are carried in water. Lack of water may also result in more international conflict. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.

The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.

The report also says long-term solutions to the water problem must include controls on population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.

小题1:__________ are expected to have severe water problems by the year 2025

A.No countries

B.18 countries

C.46 countries

D.28 countries小题2:All the following are true except____________.

A.Lack of water may cause conflict between countries

B.Egypt now has enough fresh water

C.There are solutions to the water problem

D.New industries need a lot of water小题3:It can be inferred that _____________.

A.There is connection between providing clean water and slowing population growth

B.Lack of water may also result from international conflict

C.The ability of developing has nothing to do with lack of water.

D.It is not known whether diseases have something to do with lack of water小题4:What is the solution to the water problem for a long time?

A.Not to waste water.

B.Less developing industries.

C.Less international conflict.

D.Control the population小题5:The best title of the passage would be __________.

A.World Conflict

B.Diseases and Water

C.World Water Shortage

D.Population and Water