问题 问答题

屋而卷材防水工程泛水防水构造防水层收头如何处理?

答案

参考答案:

屋面防水工程泛水防水构造防水层收头处理:

1)当墙体为砖墙时,防水层直接铺在女儿墙压顶下,压顶做防水处理;

2)也可在砖墙上留凹槽,卷材收头压入叫槽内固定密封,泛水高度250mm,凹槽上部墙体用水泥砂浆做防水处理;

3)墙体为混凝土时,卷材收头采用金属或塑料压条钉压,并用密封材料封固:

4)刚性防水层与女儿墙、山墙交接处,留宽度为30mm的缝隙,并用密封材料嵌填;泛水处铺设卷材或涂膜附加层,并进行收头处理。见图4-3-2。

多项选择题
单项选择题

Although there are many skillful Braille readers, thousands of other blind people find it difficult to learn that system. They are thereby shut (1) from the world of books and newspapers, having to (2) on friends to read aloud to them.

A young scientist named Raymond Kurzweil has now designed a computer which is a major (3) in providing aid to the (4) .His machine, Cyclops, has a camera that (5) any page, interprets the print into sounds, and then delivers them orally in a robot-like (6) through a speaker. By pressing the appropriate buttons (7) Cyclops’s keyboard, a blind person can "read" any (8) document in the English language.

This remarkable invention represents a tremendous (9) forward in the education of the handicapped. At present, Cyclops costs $ 50,000. (10) , Mr. Kurzweil and his associates are preparing a smaller (11) improved version that will sell (12) less than half that price. Within a few years, Kurzweil (13) the price range will be low enough for every school and library to (14) one. Michael Hingson, Director of the National Federation for the Blind, hopes that (15) will be able to buy home (16) of Cyclops for the price of a good television set.

Mr. Hingson’s organization purchased five machines and is now testing them in Maryland, Colorado, Iowa, California, and New York. Blind people have been (17) in those tests, making lots of (18) suggestions to the engineers who helped to produce Cyclops.

"This is the first time that blind people have ever done individual studies (19) a product was put on the market," Hingson said. "Most manufacturers believed that having the blind help the blind was like telling disabled people to teach other disabled people. In that (20) , the manufacturers have been the blind ones.

13()

A.estimates

B.considers

C.counts

D.determines