问题 问答题 简答题

封堵方式和封堵技术?

答案

参考答案:

①用金属闸门或钢筋混凝土叠梁封堵

②预制钢筋混凝土整体闸门

③混凝土塞封堵,同时在闸门槽两侧填以细粒矿渣并灌注水泥砂浆,在底部填筑黏土麻包,并在底孔内把闸门与坝面之间的金属承压板相互焊接

④定向爆破断流,山坡土闭气,,快速筑好进口围堰后在静水条件下立即浇筑水下混凝土墙作为临时堵头,继而抽水,再做函管的混凝土堵头

完形填空

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Think about an 11-year-old child spending her days washing clothes,looking after a baby brother,doing hard work on the farm.Think about a little girl.小题1: and has no water to drink because it is not clean.She has watched her father,brother and sister lose their lives because the family has no money to send for a doctor.

小题2: For Marie Pastora,these are the facts of life.

Maria Would gladly walk to school,but her mother,now alone,needs her badly at home.Maria had to leave school because of her poor family.

But for just 52 pennies a day,you can help out a child like Maria.小题3:Through Save The Children you can help Maria’s mother get better crops from their farm.and make money so that she can buy clothes and things for school.

To help Maria most,your money is to put together with other helpers,so hardworking people can help themselves.Build a school,…a hospital…make their farms better…and bring in clean water.This is what Save The Children had been about since 1932.

小题4:  You can write letters to each other, get photos,study reports.Know you are helping and saving another human being.That’s how Save The Children works. 小题5:   Please take a moment to fill out the paper below to help a child like Maria and her village.

It can make such a difference in her life and yours.

A.For you there are many returns.

B.Show her that somewhere,someone will help her.

C.One good return deserves another.

D.Hard to believe?E.She knows there will not be enough food for dinner,

F.But without you,it can’t work.

G.How to help her and her poor villagers?

多项选择题