在低压配电和控制电器装置中，继电器的场所要做到（）。 A.少震 B.少尘 C.通风

It is the duty of every man to work. The life of a lazy man is of no use to himself and to others.

The man who is too lazy to work is the man who’s generally most ready to beg or steal. Every boy should learn some useful work when he is young.

But it is not enough that a boy should learn some kind of work. He should put his effect completely into his work, and not waste his free time. “Working while you work and playing while you play is as good rule for young people as for the old.”

There is no better help to diligence (勤奋) than the habit of early rising, and this, just like all other good habits, is most easily formed in youth. There is an English saying “Lost time never returns.” This means that everybody must be diligent and make good use of his time. One must study hard when one is young so that one can make great progress, succeed in life and become useful to one’s country. Therefore, we can say that diligence is the mother of success.

小题1:After reading the passage we know that those who are too lazy to work will become________.

A．beggars

B．thieves

C．beggars or thieves

D．useful men小题2:In order to learn to be diligent, it’s most important for the young people to _________.

A．form the habit of getting up late

B．learn some good subjects

C．work all the time without play

D．work while they work and play while they play小题3:One can’t be successful in life unless he ________ when he is young.

A．spends some time learning something

B．is diligent in his study

C．makes up for his lost time

D．loves his school小题4:Which of the following may be the best title for this passage?

A．Lazy Boy Can Learn to Be Diligent.

B．Young People Should.

C．Lost Time Never Returns.

D．Diligence, the Mother of Success.

某人在一个以2.5m/s²的加速度匀加速下降的电梯里最多能举起80kg的物体，在地面上最多能举起___________kg的物体；若此人在匀加速上升的电梯中最多能举起40kg的物体，则此电梯上升的加速度为___________。

社会基本结构

O/W型乳剂转成W/O型乳剂或出现相反的变化（）

A.酸败

B.破裂

C.分层

D.转相

E.絮凝

简述艺术装饰风格特点、代表人物、代表作品。