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【简答题】
选择下列合适的词语填空 左右 短暂 寻找 开关 享受 长短 忘记 肥瘦 度过 (1) 一边听音乐一边喝咖啡 , 一种( )。 (2) 我永远不能( )我的第一个老师。 (3) 青春是( )的,要好好儿( )。 (4) 我按了录音机的( ) , 是它没有声青 , 肯定坏了。 (5) 他在菜单上( )着自己最喜欢的菜。 (6) 这件衣服 ( )合适 , 可是( )不合适。 (7) 他看上去 30 岁( ) 。
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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 events.
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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