来源于芸香科植物的药材是（）
A.桃仁
B.枳壳
C.巴豆霜
D.补骨脂
E.酸枣仁
参考答案：B
My dad has lots of writers his friends so he has a collection of books for free.[ ]
A. in
B. with
C. between
D. among
收购人以现金支付价款的，应当将不少于收购价款总额的10%作为履约保证金存入证券登记结算机构指定的银行。（）
