消火栓系统的管网安装完毕后，应对其进行强度试验、冲洗和严密性_爱下问搜题

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问题多项选择题

消火栓系统的管网安装完毕后，应对其进行强度试验、冲洗和严密性试验，下列说法中，正确的有（）。

A.水压强度试验的测试点应设在系统管网的最末端

B.管网冲洗应在试压合格后分段进行

C.管网冲洗的顺序应先室内后室外、先地上后地下，室内部分的冲洗应按配水干管、配水管、配水支管的顺序进行

D.水压严密性试验应在水压强度试验和管网冲洗合格后进行

E.水压严密性试验压力应为设计工作压力，稳压24h，应无泄漏

答案

参考答案：B, D, E

解析：A-最低点；C-先室外后室内、先地下后地上。

选择题

小鸟育雏这种行为从获得的途径和现象看分别属于（　　）

A．繁殖行为、先天性行为

B．先天性行为、繁殖行为

C．学习行为、繁殖行为

D．繁殖行为、学习行为

填空题

阅读短文,用方框内所给单词的适当形式填空,使短文意思通顺,完整.请将答案写在短文后相应题号的横线上.注意：1.每个单词只能用一次；2.每空限填一词,有些词需要做相应的变化；3.其中有两个多余选项。

succeed，they，work，careful，make，so，happy，close，one，few，either，but

Do you use your right hands more or left hands more? Very___71___of us use both of our hands well. Most people use right hands. Only about five people of a hundred use left hands. New-born babies can take things with__72___of their hands,___73___in about two years, they like to use___74___right hands. Scientists don’t know why this happens. They’ve studied it. They think our animal ancestors used their right hands, this may not be true. Monkeys are our__75___relatives in the animal world.
Scientists have found that monkeys like to use one of their hands more than the other----but it can be either hand. There are as many right-handed monkeys as the left -handed___76___. Next time you visit the zoo and do watch the monkeys__77__. You’ll see that some of them will use their right hands and others will use their left hands. But men use their right hands better and this ___78___life difficult for the left-handed ones. We live in a right-handed world. Some scientists have found out that more of __79__people are left-handed, but they don’t know why. But they are _80_hard to discover the secret.
小题1:___ 小题2: ____ 小题3: ____小题4: ____ 小题5: _____ 小题6:____小题7: _____小题8: ____小题9: _____小题10:______