中药川木通为毛茛科植物小木通或绣球藤的（）
A.幼嫩藤茎
B.变态茎枝
C.带叶藤茎
D.去栓皮藤茎
E.未去栓皮藤茎
参考答案：D
—Our P.E. teacher isn't as young as he _____, is he?
—No, but he is one of _____ in our school.[ ]
A. looked; the youngest teacher
B. looks; the youngest teachers
C. looks; the oldest teachers
D. looked; the oldest teacher
什么叫吸收率？
