具有引血下行作用的药物是（）。
A.吴茱萸
B.红花
C.丹参
D.牛膝
E.川芎
参考答案：D
—Lily is the most hard-working student in our class.
— She can't be so careless. [ ]
A. Don't I think so?
B. I think so.
C. I hope not.
D. I'm afraid so.
下列景观表示平原的是
A．A
B．B
C．C
D．D
