根据1998年7月1日实施的《国家危险废物名录》,我国危险废物共分为( )类。
A.55
B.47
C.147
D.117
参考答案:B
—Do you know ________, Mike?
—On May 12th, 2008 [ ]
A. when the earthquake took place in Wen Chuan
B. when did the earthquake take place in Wen Chuan
C. when the earthquake will take place in Wen Chuan
哪些属于网络社群的信息科技?()
A.新闻讨论区
B.MSN
C.聊天室
D.网络相簿