水闸连接建筑物中铺盖的主要作用是( )。
A．防冲
B．消能
C．排水
D．防渗
参考答案：D
— Who is that man over there? Is it Mr. Wang?
— That _____ Mr. Wang. He has gone to Beijing. [ ]
A.. must be
B. mustn't be
C. can't be
D. can be
噻螨酮
