血压持续在21.3/12.6kPa（160/95mmHg）以上，眼底动脉普遍狭窄，属于（）
A.高血压病1级
B.高血压病2级
C.高血压病3级
D.高血压病危象
E.高血压脑病
参考答案：B
解析：高血压病的分级为：1级（140～159/90～99mmHg），2级（160～179/100～109mmHg），3级（≥180/≥110mmHg）。高血压危象指高血压患者在短期内血压明显升高，并出现头痛、烦躁、心悸、多汗、恶心、呕吐、面色苍白或潮红、视物模糊。高血压脑病指血压骤然升高，剧烈头痛，呕吐，意识模糊，抽搐。
| Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation. About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag. |
The passage starts with an elephant story in order to explain that in India ______.
A．people easily fall victim to elephants’ attacks
B．the man-elephant relationship is getting worse
C．elephant tamers are in short supply
D．dogs are as powerful as elephants