按照住建部有关规定,设备安装工程合同价在5000万~1亿元的,总承包单位配备项目专职安全生产管理人员数量应不少于()人。
A.1
B.2
C.3
D.5
参考答案:B
You can't imagine _______ when they received these nice Christmas presents. [ ]
A. how they were excited
B. how excited they were
C. how excited were they
D. they were how exited
()通风矿井在主通风机停止运转的一定时间内,风流中的瓦斯浓度会降低。