问题
单项选择题 A1型题
放射性核素脑灌注显像时使用过氯酸钾最主要的目的是（）
A.增加脑血流量
B.封闭脉络丛
C.减少胃黏膜的摄取
D.减少甲状腺摄取
E.封闭甲状腺
答案
参考答案：B
解析：放射性核素脑灌注显像时使用过氯酸钾最主要的目的是封闭脉络丛减少干扰。
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放射性核素脑灌注显像时使用过氯酸钾最主要的目的是（）
A.增加脑血流量
B.封闭脉络丛
C.减少胃黏膜的摄取
D.减少甲状腺摄取
E.封闭甲状腺
参考答案：B
解析：放射性核素脑灌注显像时使用过氯酸钾最主要的目的是封闭脉络丛减少干扰。
| 根据短文内容从方框内选择正确的词，并用适当的形式填空，使短文在结构和意义上完整、通畅。 | |
Everyone ____1____ friends. We all like ___2___ close to someone. It is nice to have friend to talk and ___3___ things with. Certainly, sometimes, we need to be ___4____ . We don't always want people around. But a man will feel lonely if he ____5____ a friend. No two people are just the same . Friends sometimes don't get on ____6___ . That doesn't mean that they no longer like each other . Most of the time , they will make up and become friends again. There ___7____ more good news for people who have friends . They live longer than people who don't . Why? It could be that they are ___8____ . Being happy ___9___ you stay well . Or it could be just knowing that someone cares. If someone cares about you, you take better care of ___10____. |