对特定疾病有显著疗效的中药是
A．肉豆蔻B．洋金花C．山茱萸D．梅花鹿茸E．蕲蛇
参考答案：B
The man is too old, and he can't take care of himself. He has to __________ his sons.[ ]
A. babysit
B. look after
C. depend on
支持程序浮动的地址转换机制是
A．页式地址转换
B．段式地址转换
C．静态重定位
D．动态重定位
