肺动脉高压时肺纹理减少主要发生在（）
A.周围肺野
B.肺门周围
C.上肺野
D.下肺野
E.中肺野
参考答案：A
根据汉语、首字母及句子意思补全句子。
1. Go________ (穿过) the street when the light is green.
2. I'm very ________ (饥饿的) . I want some food to eat.
3. How do you ________ (抵达) at the airport?
4. In the g________, there are some vegetables.
5. We saw her when she p________ the classroom.
二尖瓣狭窄时下列哪种处理不恰当（）
A.保持体循环阻力
B.降低肺循环阻力
C.适当增加前负荷
D.增加心率
E.尽量少用正性肌力的药物
