安全监察是为了督促()按照安全法规和有关规定从事生产经营活动。
A.企业管理者
B.现场作业人员
C.地方政府
D.用人单位
参考答案:D
Either you or one of your students___to attend the meeting__ tomorrow.
A.are; to be held
B.is;being held
C.is; to be held
D.are;having held
婴儿气管支气管分叉处在()
A.T1
B.T2
C.T3
D.T4
E.T5