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问题 问答题 论述题

脱轨自动制动阀由哪些配件？

答案

参考答案：

脱轨自动制动阀由拉环、顶梁、调节杆、作用杆、锁紧螺母、弹片、制动阀杆和阀体等组成.拉环与顶梁通过圆销连接，顶梁与调节杆采用焊接，调节杆与作用杆采用销接，制动阀杆端头穿入作用杆孔中，作用杆由上下对称放置的两个弹片支承在阀体上并通过锁紧螺母预紧.

单项选择题

Water is (41) important of all the things we (42) and drink. Not many people understand this, (43) it’s quite true. The human body (人体) can go (44) food for a long time, but two (45) three days without water can usually (46) people die.
Many people don’ t understand how much water the human body needs to work well and many people do not drink (47) , even (48) hot weather.
Our body is (49) water, about 65% to 75%, ff we do not have enough water, we’ll (50) tired and many will get ill. So you see, how important water is to us all.

[A] make [B] get[C] let
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填空题

碱金属对烧结矿的还原过程，还原粉化和（）都有影响。
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