近一个世纪以来,全球气温呈逐渐上升趋势。其主要原因是[ ]
A.地球距离太阳越来越近
B.局部不断发生战争
C.各地频繁发生森林火灾
D.人类大量排放二氧化碳
答案:D
When you come into the exhibition hall,you can see a large board with a notice on it,saying visitors__________not to touch the exhibits.
A.will request
B.request
C.are requesting
D.are requested
地西泮的不良反应有
A.嗜睡、头昏、乏力
B.大剂量可产生共济失调
C.长期应用可产生耐受性、依赖性
D.帕金森综合征
E.凝血机制障碍