停电后离心式压缩机组()。
A、不能盘车
B、隔5分钟盘车一次
C、高位油箱没油后停止盘车
D、高位油箱没油后再盘车
参考答案:C
The driver began to speed up to _____ for the hour he'd lost in the traffic jam. [ ]
A. keep up
B. take up
C. catch up
D. make up
在分层法计算时,各层柱的线刚度应乘以0.9,传递系数为1/3。()