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【单选题】
病人,男45岁,失血性休克。病人的脉搏特征是A.
强大有力
B.
细弱无力
C.
动脉管壁变硬,失去弹性
D.
单位时间内脉率少于心率
E.
每隔一个正常搏动后出现一次期前收缩
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皮皮学刷刷变学霸
举一反三
【单选题】关于 CD8 分子的作用,叙述错误的是:
A.
能与MHC-Ⅰ分子非多态区结合
B.
增强 Th 细胞与靶细胞的结合
C.
参与抗原刺激 TCR-CD3 信号转导
D.
参与 T 细胞在胸腺内的分化
【单选题】听力原文：W: You know, I've just finished some very interesting research for the newspaper about things people do in their spare time. M: Really? What did you learn? W: Well, I talked to 20 people, and 19 ...
A.
Popular sports s.
B.
TV programs people like best.
C.
Things people do after work.
【单选题】听力原文：W: What did you do last year? M: I was a reporter. W: I think it was interesting, right? M: Yes, it was interesting. But I had to work long hours. I was never at home on weekends. How did the man...
A.
He doesn't like it because it kept him busy.
B.
He doesn't like it because it is uninteresting.
C.
He likes the work very much.
【单选题】听力原文：W: Do you think the history course is interesting? M: Yes, but it is very difficult. I'll never get through the reading list. Q: What can we learn from the man's reply? (14)
A.
The man finds the history course too difficult for him.
B.
The man finds the history course very interesting and rewarding.
C.
The man finds the history course very easy and interesting.
D.
The man finds the history course interesting but demanding.
【简答题】已知电路如图a所示，U S1 =10V，R 1 =1kΩ，R 2 =2kΩ，试求ab端戴维南等效电路。
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