斜巷拉放车前应做好安全检查方法不包括、检查勾头30米内大绳状况,检查车辆周围及绞车道是否有人行走,查看声光信号是否符合规定。
参考答案:错
— How was your job interview?
— Oh, I couldn’t feel ______. I hardly found proper answers to most of the questions they asked.
A.better
B.easier
C.worse
D.happier
离心泵启动前,未进行排空,可能会产生()。
A.气缚
B.叶轮卡阻
C.机械密封泄漏
D.轴承损坏