汽轮机在突然甩负荷时,会造成推力盘反弹,瞬间冲击()
A.工作瓦块
B.非工作瓦块
C.主轴瓦
D.轴承座
参考答案:B
-I’ll come to see you this afternoon. Shall I bring something to read?
--OK, _________.
A.you are welcome
B.by no means
C.take your time
D.so much the better
引发车祸的主导因素是()
A.驾驶员的错误
B.行人的错误
C.健康教育不到位
D.道路状况不好
E.人为错误