M2000位于运维体系的哪个层级（）。
A.NMS
B.EMS
C.LMT
D.NE
参考答案：B
《全唐诗》收录的是唐代
A.4万8千多首诗
B.305首诗歌
C.10万多首诗歌
D.1000多首诗歌
Don’t be upset．I think Tom, rather than you, _______
A is to blame B are to blame C is to be blamed D are to be blamed
