生长是机体在质的方面的变化,发育是机体的量的发面的变化。
参考答案:错
危险货物是指具有燃烧、爆炸()等性质,在运输、装卸、贮存过程中,容易造成人身伤亡、财产损毁以及对环境造成危害的物品。
A.腐蚀
B.毒害
C.放射
D.风化
As for the influence of Internet,nowhere()the results more clearly than in the US.
A.we have seen
B.we had seen
C.seen we have
D.have we seen