三棱的药用部位为（）
A.根
B.根茎
C.块根
D.根及根茎
E.块茎
参考答案：E
As we know, he is _____ as his younger brother is.[ ]
A. as a intelligent student
B. as intelligent a student
C. as a student intelligent
D. a student as intelligent
长江在我国各河流中居首位的是（ ）
①流程长度②流域面积③含沙量④年径流量⑤结冰期 ⑥水能蕴藏量．
A．①②④⑤
B．①②④⑥
C．②④⑤⑥
D．③④⑤⑥
