Colors can change our moods and make us__________ happy or sad, energetic or sleepy.     [ ]

A. to feel              

B. feeling    

C. feel                

D. feels

通过直接阻断α_L受体而降压的药物是（）

A.利血平

B.甲基多巴

C.哌唑嗪

D.硝苯地平

E.氢氯噻嗪