下列中药饮片中药典规定用量为3～9g的药物是（）。
A.珍珠
B.制马钱子
C.龙骨
D.川芎
E.熟地黄
参考答案：D
8000米=______千米
5厘米=______毫米．
Directions:
Write an essay of 160-200 words based on the following drawing. In your essay, you should
1) describe the drawing briefly,
2) explain its intended meaning, and then
3) give your comments.
