Oh, You're back at work? How was your holiday? ()
A. We had rain every day and stayed at the hotel most of the time.
B. The ten-day holiday was not long enough.
C. I was missing you when I was on holiday.
D. I heard you were on holiday, too.
查看答案
六大常用水泥的初凝时间均不得短于60min。
A. 正确
B. 错误
正确使用质量合格的安全套可以减少感染性病和艾滋病病毒的危险。
A. 正确
B. 错误
电缆敷设施工,竖井作业使用三脚架时,钢丝绳不得()其他井下设施。
A. 靠近
B. 平行
C. 接触
D. 磨蹭