男性，52岁，原有劳累型心绞痛，近2周来每于清晨5时发作，疼痛持续时间较长入院，住院期间发作时心率50次／分，早搏4~5次／分，血压95/60mmHg，心电图Ⅱ、Ⅲ，aVFST段抬高，加用硝苯地平后未再发作，应用硝苯地平机制是（）
A.增快心率，增加心排，改善心肌供血
B.减慢心率，降低心肌耗氧
C.缓解冠脉痉挛
D.提高血压，改善心肌灌注
E.增快心率，消除早搏
参考答案：C
| 在右栏中找出与左栏问句相对应的答句，将其字母代号填在题前括号内。 |
| ( )Where's the Art Museum? ( )Which season do you like best? ( )What do you usually do on Sundays? ( )What is your hobby? ( )What did you do yesterday? ( )What's your e-mail address? | A. Collecting stamps. B. We played cards. C. It's on Zhongshan Road. D. I like summer best. E. It's liuling@163. com. F. I usually go fishing. |