问题 问答题 简答题

山丘区灌区如何布置干、支渠?

答案

参考答案:

布置形式主要有以下两种:

1、干渠沿等高线布设。适用于地面像一面倾斜,灌区位于分水领与山溪或河流之间,等高线大致与河流平行。支渠从干渠一侧引出。

2、干渠垂直等高线布置。适用于灌区中间高两侧低,成脊梁形,耕地分布于分水岭两侧。干渠沿脊线布置,支渠自干渠两侧分出。

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七选五(共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

As we know, sport is very common in our daily life. People who usually compete in sports can be found everywhere. Why so many people love sports? __1__

Generally speaking, it is good for our health to do sports, such as basketball, football, table tennis, swimming, badminton, and so on. __2__ I have taken the swimming course this term, since I didn’t know how to swim. I find that swimming is very interesting and has many benefits for our bodies. On one hand, it can make our blood circulatory system run regularly. On the other hand, the muscles of our bodies can be massaged(按摩) under the pressure of water. All these are positively advantageous to our health.

__3__ It is known to us that some sports are team sports that involve several players or even more. When playing with others, people must face the situation of getting along with others. Through the sport games, strangers may go easily with others and make friends with each other. __4__ If you don’t know what to do, doing exercises may be a good idea because you can share the time and the fun with your friends.

__5__Yes, that’s right. But the advantages of sports are more than its disadvantages. We should follow the lead of sports athletes, as sports play an essential role in our life. Plenty of physical exercise will help you keep fit.

A.I think I love the sports deeply.

B.Just take swimming for example.

C.There are many reasons for this.

D.I like the sports, which is interesting.E. Besides, sport is also a way of communication.

F. Some people may say it is easy to be hurt while having sports.

G. What’s more, they can get satisfaction from the competitive sports.

单项选择题