在巷道中布置隔爆水棚，主水棚组总水量按巷道断面计算不小于400L/m2，水棚组度不小于（）m。
A.10
B.20
C.30
参考答案：C
----Doctors, it seems that you like to work with animals.
----Yes, I think animals should ______ as our friends.
A．regard
B．be regarded
C．be regarding
D．are regarded
数据字典
