问题 单项选择题 B1型题

主动脉瓣狭窄()。

A.原有房颤突然出现心室率过速者,不宜采用电复律以免血栓脱落而造成栓塞

B.硝酸甘油常不能解除其引起心内膜下缺血的心绞痛

C.麻醉中轻度的心率增快最有益

D.多在控制性降压下实施手术治疗

E.动力型肺动脉高压形成较晚

答案

参考答案:B

解析:1.动力型肺动脉高压形成较晚的是房间隔缺损。 2.硝酸甘油可降低肺动脉压,而对外周动脉压影响较小。硝酸甘油的禁忌证有低血压(SBP<90mmHg)、严重心动过缓(心率<50次/分)/心动过速(心率>100次/分)。主动脉瓣狭窄出现的缺血性心绞痛效果欠佳,因更易出现低血压,也应慎用硝酸甘油。 3.二尖瓣狭窄多合并心房附壁血栓。 4.麻醉中轻度的心率增快,使二尖瓣关闭不全患者反流量减少。 5.动脉导管未闭患者多在控制性降压下实施手术治疗。

阅读理解

第二节(共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白的最佳选项。选项中有两项为多余选项。 (E="AB " F=" AC  " G=AD)

All over the world people enjoy sports. Sports help to keep people healthy and happy, and to live longer.

61. They buy tickets or turn on their TVs to watch the games. Often they get very excited when their player or team wins.

62. Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers. What fun it is to jump into a pool or lake, whether in China, Egypt or Italy!  __63___. Think how many lovers to skate or ski in Japan, Norway or Canada.

Some sports or games go back thousands of years, like running or jumping. Chinese wushu, for example, has a very long history. But basketball and volleyball are rather new. Neither one is a hundred years old yet. ___64_____. Water—skiing is one of the newest in the family of sports.

People from different countries may not be able to understand each other, but after a game together they often become good friends. ____65_____. One learns to fight hard but fight fair, to win without pride and to lose with grace. (胜不骄,败不馁)

A. And think of people in cold countries.

B. Sports help to train a person’s character (性格)

C. Not a few people like sports in the word.

D. Many people like to watch others play games.

E. People aren’t inventing new sports or games.

F. Some sports are so interesting that people everywhere take part in them.

G. People are inventing new sports or games all the time.

单项选择题