问题 单项选择题

浅埋暗挖法修建隧道的施工方法中,对围岩的扰动次数最少的是()。

A.全断面法 

B.正台阶环形开挖法 

C.中隔壁法 

D.CRD法

答案

参考答案:A

解析:

全断面开挖法采用一次开挖成型,该方法是对围岩的扰动次数最少,但对地质条件要求严格,围岩必须有足够的自稳能力。

考点:喷锚暗挖(矿山)法施工

选择题
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When you leave school,you can breathe sigh of relief and leave learning behind,right?Wrong!Learning should last a lifetime. You exercise your body to stay strong,and you should exercise your mind to stay sharp.

An English idiom says,“You can’t teach an old dog new tricks.” But scientists have discovered that isn’t true. Older people can learn,and they should,in order to keep their brain active. Now a new trend has begun in several states in the US that encourages learning. Adults can attend One Day University. They can spend a Saturday or Sunday hearing four 70-minute lectures. Each one is given by a top university professor. One of the original participants said,“It’s like a health club for the brain.” Also,universities like MIT have made all of their courses and lectures available online for free!Libraries offer learning programs too. With so much available,there is no excuse not to learn!

Learning is a habit. Don’t leave it behind after you leave school. On the website lifehack.org,author Scott Young mentions several things to help you.

Always have a book. It doesn’t matter if you read fast or slow. Just read. If you read just one book a week,you’ll read 52 over the course of a year. Think of the knowledge you’ll gain!

Practice it. As you read,do something with what you’ve learned. Don’t just enjoy the mental exercise. Use the knowledge. If you read about painting,try it!

Make a “to learn” list. Compose a “to learn” list for yourself. Maybe you want to speak better English,play the piano,or cook French food. Whatever interests you,put it on your list and then make the time to do it.

Teach others. Whatever you learn,teach someone else. You’ll not only help others but also understand what you’ve learned.

小题1:What’s the best title for this passage?

A.Make learning last a lifetime.

B.What you should do after leaving school.

C.Several tips on learning.

D.A new trend in learning.小题2:What does the underlined part in Paragraph 1 mean?

A.You don’t need to consider what you have learnt after graduation.

B.You can relax as you have escaped from the hard life of studying.

C.Leaving learning behind is what you should do after a break.

D.You should have a good rest and then go on learning.小题3:How many ways of learning for adults in the US are mentioned in Paragraph 2?

A.One.

B.Two.

C.Three.

D.Four.小题4:Which of the following is NOT a suggestion made by Scott Young in the passage?

A.Keep learning as a habit.

B.Always have a book.

C.List what you want to learn.

D.Teach others what you learn.