下列功效中，属于辛味药的是（）
A.行气活血
B.通便
C.补益
D.缓急
参考答案：A
两台旋流器串联分选三产品的串联工艺优缺点。
— Look! How tall the tree is!
— Yes. It ______ nearly 20 metres. [ ]
A. measures
B. is measured
C. is measuring
D. measured
