关于可待因的叙述,不正确的是()
A.为前体药物
B.镇痛效力为吗啡的1/5或更低
C.剂量增加,镇痛作用明显增强
D.具有明显的镇咳作用
E.可引起便秘
参考答案:C
In order to earn more money for his new car, the young man has to work for three ______ hours in
the evening. [ ]
A. extra
B. many
C. else
D. another
在Word的替换对话框中,可以同时替换所有找到的字串。