患者，女，28岁。妊娠3月，腰痛如折，小腹下坠。用药宜首选（）
A.川牛膝
B.杜仲
C.五加皮
D.肉苁蓉
E.独活
参考答案：B
—I heard that Mr Smith found a way to fix our computer.
—Really? That was very _____ of him. [ ]
A. generous
B. clever
C. easy
D. necessary
什么是分权制分权制组织有哪些特点
