发现轴承外圈、前盖、后挡有裂损或破损,轴承前盖丢失时须更换()。
A.制动梁
B.侧架
C.摇枕
D.轮对
参考答案:D
短文填词。
It's Sunday (1)m . It's a little cold. Sandy gets up very early. She puts on her white (2)T-
and dark blue (3)p . She likes these two (4)c . She wants to go (5)s with her mother
because she (6)w to buy some exercise (7)b . At 9:00, they are in a supermarket. There are a
lot of (8)p in the market. The (9) (服务员) there are very (10)f (友好的).
关于震后自救与互救的叙述,不正确的是[ ]
A.地震对人的伤害主要是倒塌的建筑物对人的埋压和砸伤,所以学会处理外伤的基本方法很必要
B.当人被压埋在废墟下时,要尽力呼救以寻求援救
C.当人被压埋在废墟下时,要用毛巾、衣袖等捂住口鼻以防窒息
D.在等待救援的过程中,要有生存的勇气和顽强的毅力,挑战生命极限