善能补益脾肺，治疗脾肺气虚的药物是（）。
A.人参
B.党参
C.西洋参
D.黄芪
E.山药
参考答案：A, B, C, D, E
— My car has broken down. Could you please give me a ride tomorrow?
— I'm sorry I _____. I'm leaving for London tonight. [ ]
A. can't
B. mustn't
C. couldn't
D. shouldn't
轮性生长（verticillate growth）
