金本位制下,汇率的波动的原因是()
A.各国政策因素
B.不同国家货币成色不同
C.外汇市场供求
D.金价波动
参考答案:C
The young man called John was often seen _____ by the lake.[ ]
A. to draw
B. to drawing
C. draw
D. drew
服用阿司匹林的主要副作用是
A.满月脸B.激素水平下降C.胃肠反应D.精神症状E.抑制免疫