搜题请搜索小程序“爱下问搜题”
问题 单项选择题

左心功能不全时发生呼吸困难的主要机制是______

A．低血压
B．肺淤血、肺水肿
C．心肌缺血缺氧
D．体循环淤血，回心血量减少
E．支气管平滑肌敏感性增高

答案

参考答案：B

阅读理解

阅读理解。

     Today is Sunday. I haven't got any classes. I'd like to visit my grandparents in the morning. They are

seventy years old. In the afternoon, I'd like to play basketball with my friends. We all like playing basket-

ball. In the evening, I'd like to do my homework. Then I watch TV. 

1. Today is _____.

A. Friday

B. Saturday

C. Sunday

D. Monday

2. I'd like to _____ in the morning.

A. visit my grandparents

B. do my homework

C. go to the park

D. go to the cinema

3. I'd like to _____ in the afternoon.

A. play football

B. play basketball

C. see a film

D. watch a basketball match

4. I like playing _____.

A. tennis

B. basketball

C. football

D. table tennis

5. I _____ in the evening.

A. watch TV

B. don't watch TV

C. don't do my homework

D. read books
查看答案
单项选择题 A1/A2型题

与金黄色葡萄球菌感染无关的是（）

A.皮肤化脓性炎症

B.其他器官化脓性感染

C.大叶性肺炎

D.假膜性肠炎

E.食物中毒
查看答案