问题
单项选择题
轨束梁的容许跨度与轨束梁弯曲应力有关，支点中心距一般不宜超过（）m。
A.3.1
B.3.2
C.3.3
D.3.4
答案
参考答案：D
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轨束梁的容许跨度与轨束梁弯曲应力有关，支点中心距一般不宜超过（）m。
A.3.1
B.3.2
C.3.3
D.3.4
参考答案：D
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| What is your favourite colour? Do you like yellow,orange,red? __1__Do you prefer grey and blue? Then you are probably quiet,shy,and you would rather follow than lead. You tend to be a pessimist. At least,this is what psychologists tell us,and they should know,because they have been seriously studying the meaning of colour preference,as well as the effect that colours have on human beings. __2__If you happen to love brown,you did so,as soon as you opened your eyes,or at least as soon as you could see clearly. __3__A yellow room makes most people feel more cheerful and more relaxed than a dark green one; and a red dress brings warmth and cheer to the saddest winter day. __4__ A black bridge over the Thames River,near London,used to be the scene of more suicides(自杀) than any other bridge in the area-until it was repainted green. The number of suicide attempts immediately fell sharply. Perhaps it would have fallen even more if the bridge had been done in pink or baby blue. __5__It is an established fact that factory workers work better,harder,and have fewer accidents when their machines are painted orange rather than black or grey. |
| A. On the other hand,black is depressing. B. They tell us,among other facts,that we do not choose our favourite colour as grow up-we are born with our preference. C. The rooms are painted in different colours as you like. D. If you do,you must be an optimist,a leader,an active person who enjoys life,people and excitement. E. Light and bright colours make people not only happier but more active. F. Life is like a picture or a poem,full of different colours. G. Colours do influence our moods-there is no doubt about it. |