问题 单项选择题 A1型题

给排水设备施工图识读过程通常有:

①阅读给排水总平面图,了解给排水管和设施在建筑物外的总体布置。

②阅读平面图,了解给排水管道和设备在室内平面布置情况。

③阅读系统图,了解管道空间走向和设备空间位置。

④阅读详图,了解现场加工和安装的细节问题。

识读给排水设备施工图的正确顺序()

A.①②③④

B.②③④①

C.③④①②

D.④③②①

E.④①②③

答案

参考答案:A

解析:识读给排水施工图的基本程序是:阅读总平面图→阅读平面图→阅读系统图→阅读详图。

阅读理解

Trees are useful to man in three important ways: they give him wood and other useful things, they give him cool places, and they help to stop drought and flood.

Unluckily, in many parts of the world, man has not found that the third of these points is the most important. Man wants to make money from trees, so he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And also, he is usually too careless to plant and look after new trees. So the forests slowly disappear.

This does not only mean that man will have fewer trees. The results are even worse: for where there are trees, their roots break up soil-make the rain in-and also bind the soil, thus stopping it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing is left but useless desert.

1.The most important points of trees to man is ________.

A. they help him to make money               B. they give him cool

C. they give him wood and other things       D. they help him to stop drought and floods

2.In many places forests slowly disappear because ________ .

A. many trees have been cut down by man

B. new trees are not well looked after

C. man has not paid enough attention to planting trees

D. all the above

3.Land becomes desert after all trees are cut down because ________ .

A. roots of trees break up the soil   

B. there are too many rainfalls

C. strong winds bring a lot of sand

D. there are no longer trees to keep the rain and protect the top-soil.

4.Which title best fits the passage?

A. Trees and Man                                      B. The Function of Tree Wood

C. How do People do with Trees?                  D. The Usage of Tree Roots

多项选择题