问题 问答题 简答题

地板瓦翘的原因及解决办法?

答案

参考答案:铺装和产品本身问题:

1.地板铺设时水泥地皮不平,龙骨含水率过大;

2.室内环境干燥,房间长时间处于湿度过大状态;

3.地板含水率太高;

4.室内环境湿度过大,地板含水率偏低;

5.地板开槽太浅,板面太宽;

6.使用胶水含水量过大;

解决:

1.拆除踢脚线通风排湿,使其恢复正常;

2.拆除变形地板平放于通风处,不宜暴晒、暴吹,并在地板上加平整重物平亚,使其恢复正常;

3.对变形地板进行更换。

单项选择题
单项选择题

The idea of test-tube babies may make you either delighted at the wonders of modern medicine or irritated while considering the moral, or legal, or technological implications of starting life in a laboratory. But if you’’ve ever been pregnant yourself, one thing is certain: You wonder what it’’s like to carry a test-tube baby. Are these pregnancies normal Are the babies normal The earliest answers come from Australia, where a group of medical experts at the Queen Victoria Medical Center in Melbourne have taken a look at the continent’’s first nine successful invitro pregnancies. The Australians report that the pregnancies themselves seemed to have proceeded according to plan, but at birth some unusual trends did show up. Seven of the nine babies turned out to be girls. Six of the nine were delivered by Caesarean section. And one baby, a twin, was born with a serious heart defect and a few days later developed life-threatening problems.What does it all mean Even the doctors don’’t know for sure, because the numbers are so small. The proportion of girls to boys is high, but until there are many more test-tube babies no one will know whether that’’s something that just happened to be like that or something special that happens when egg meets sperm in a test tube instead of a fallopian tube. The same thing is true of the single heart defect. It usually shows up in only 15 out of 60,000 births in that part of Australia, but the fact that it occurred in one out of nine test-tube babies does not necessarily mean that they are at special risk. One thing the doctors can explain is the high number of Caesareans. Most of the mothers were older, had long histories of fertility problems and in some cases had had surgery on the fallopian tubes, all of which made them likely candidates for Caesareans anyway.The Australian researchers report that they are quite encouraged. All the babies are now making normal progress, even the twin with the birth defects.

What is the author’s tone in this passage

A.Depressed.

B.Optimistic.

C.Opposing.

D.Negative.