He was late this morning, because the bus was too _______ for him to get on. [ ]

A. quiet

B. tidy

C. crowded

D. noisy

降低肾素活性最明显的药物是（）

A.氢氯噻嗪

B.可乐定

C.肼苯哒嗪

D.普萘洛尔

E.利血平