问题 问答题 简答题

旧水泥混凝土路面作基层应经过哪些处理?

答案

参考答案:

应将旧水泥混凝土路面清除干净,剔除缝内泥土杂质,并灌进油200沥青,嵌入0.5~1cm的碎(砾)石粒料,刮平,若有坑槽,也应以沥青混合料填升坑槽后方可做面层工作,若做沥青面层时,旧路面应进行一次粘层油处理,若仍做水泥混凝土路面,除沥青灌缝外,不做粘层油处理。由于旧水泥混凝土路面的纵横缝,常使铺后的沥青路面出现裂缝,如在这种底层上加1.5cm以上的其他基层作为隔离层后,再加铺沥青面层,即可清除这种裂缝。

阅读理解

Have you ever stayed in a hotel? Most Chinese hotel often provide guests with things like disposable(一次性的)toothbrushes, toothpaste, shampoo and slippers. Many guests like the idea because they don’t have to bring their own.  But ,if you travel to Beijing, remember to bring your own things.  Starting from June, some hotels in Beijing will no longer provide guests with these disposables.  They want to ask people to use fewer disposable things.

Many disposable things are made of plastic.  People throw them away after only using them once.  It is a waste of natural resources(资源)and is very bad for the environment.  Do you know that one Chinese person makes as much as as 400kg of waste a year? Most of that waste comes from disposable things.  In Beijing, people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to bread down.  So wherever you travel, bring your own things and use them again and again.

Back at home and school, you can also do something to make our world a better place.  Try to do these things in your daily life: use cloth shopping bags, not plastic ones. After using a plastic bag, wash it out and let it dry.  Then you can use it over and over again.  Do not use paper cups.  At your school canteen(食堂). use your own bowl and chopsticks instead of(代替) disposable ones.

小题1:Which of the following may still be provided(被提供) in Beijing hotels after June?

A.toothbrushes

B.tea cups

C.shampoo

D.paper slippers.小题2:Why do many hotels provide guests with some disposable things?

A.To let their guests take fewer things while travelling.

B.To hope their guests use fewer disposable things.

C.To wish their guests to save money.

D.To want their guests to use more disposable things.小题3:Which of the following is NOT true?

A.Many disposable things are made of plastic.

B.Throwing disposable things away is a waste of natural resources.

C.Plastic is very bad for the environment.

D.Plastic breaks down easily.小题4:What can we do to make our world a better place at home and school?

A.Using shopping bags made of plastic.

B.Using paper cups instead of plastic ones.

C.Using disposable plates, bowls and chopsticks.

D.Using everything over and over again.小题5:We can tell from the story that____________________________.

A.People don’t like disposable things at all.

B.We can’t use paper or plastic bowls at school.

C.We should use fewer plastic things and protect our environment.

D.Hotels won’t provide disposable things to save money.

多项选择题