Question

    Mark Twain once said that everyone talks about the weather, but no one ever does anything about it. This was true in his day. But it may not be the cave in today’s world. In fact, humans have found many different ways to control the weather.

Cloud seeding(云催化) is a kind of technology that can control rain. It is done by spreading chemicals like dry ice or silver iodide(碘化银) inside of clouds, either by rocket or airplane. This changes water content inside the cloud, which helps to control the rainfall, the time and even the place where it rains.

This technology has helped to solve natural disasters, such as droughts(干旱). It has also played a key role during important events. For example, China used cloud seeding in Beijing just before the 2008 Olympic Games in order to stop rain from falling during the event.

Cloud seeding has been put into use for some time, however, some scientists are still wondering whether this technology is safe. On one hand, it is believed that it might have side effects(副作用). For example, silver iodide may be bad for the environment. On the other hand, no two clouds are the same, so every new experiment introduces new conditions.

In addition to controlling rain, scientists have also tried to find ways to weaken storms and hurricanes. Scientists at the US National Hurricane Centre Headquarters think it might be possible to control hurricanes by using lasers(激光). Others believe that burning rock oil in a hurricane’s path could slow the storms down.

1.The material above may be from a(an) ___________.

A.poem B.play C.advertisement D.magazine

2.What can we learn about cloud seeding?

A.Cloud seeding may not be environmentally friendly.

B.Cloud seeding can solve all the problems caused by rain.

C.Cloud seeding technology is welcomed by all the scientists.

D.Cloud seeding has been in use to control storms and hurricanes.

3.This passage is probably written to tell ___________.

A.the advantages of cloud seeding B.the importance of technology

C.the ways of controlling the weather D.the side effects of cloud seeding

Answer

1.D

2.D

3.C

【解析】

本文是一篇说明文，介绍了人类用于控制天气的不同方法。

1.题意：上述材料可能来自于__________。

推理判断题。通读全文可知，本文是一篇说明文，介绍了人类用于控制天气的不同方法，通常关于此类科普性质的文章会出现在科学类的杂志中。D选项magazine“杂志”符合题意，故选D。

2.题意：关于人工降雨，我们可以知道些什么？

推理判断题。根据原文第5段In addition to controlling rain, scientists have also tried to find ways to weaken storms and hurricanes可知，除了控制降雨，科学家们还试图找到其他减弱风暴和飓风的方法，由此可推断云催化已经被应用到了减弱风暴和飓风上。D选项Cloud seeding has been in use to control storms and hurricanes“云催化已经被用来控制风暴和飓风”符合题意，故选D。

3.题意：这篇文章可能是为了说明__________。

主旨大意。原文第1段最后一句In fact, humans have found many different ways to control the weather点出了本文的写作目的，即人类已经找到许多不同的方法来控制天气。C选项the ways of controlling the weather“控制天气的方法”符合题意，故选C。