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
设备自然劣化是设备受（）。
He seems poor, but I ________ that he has quite a lot of money. [ ]
A. wonder
B. suspect
C. convince
D. assure
