危险化学品对应急救援人员的危害可能有()。
A.冻伤
B.中毒
C.化学爆炸、打击
D.噪声
E.烫伤
参考答案:A, B, C, D, E
the red switch on the left and the flying machine will swiftly go up into the air and its journey.
A.Press, begins
B.Press, begin
C.Pressed, begins
D.To press, to begin
市场结构与网络会有怎样的关系?