终止心室颤动最有效的方法是()
A.胺碘酮
B.利多卡因
C.胸外拳击复律
D.阿托品
E.直流电除颤
参考答案:E
--- Why are you so late?
--- I was in half the way when it ________to me that I had left my notebook home, so I had to fetch it.
A.occurred
B.hit
C.happened
D.reminded
由商品的价格变动所引起的商品相对价格的变动,进而由商品的相对价格变动所引起的商品需求量的变动,称为( )。
A.挤出效应 B.替代效应C.收入效应 D.外部效应