单项选择题

血中Hb含量低于多少时，即使重度缺氧，也难发现发绀

A.<50g／L
B.<60g／L
C.<70g／L
D.<80g／L
E.<90g／L

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听力原文：M：Susan，are you free this evening? How about going to the movie?W：I'm sorry．I have to go to the library now and then my friends had already invited me to a concert at eight．Q：What is Susan going to do with her friends this evening?(15)A.She is going to see a film.B.She is going to attend a concert.C.She is going to the library.D.She is going to visit her friends.

A.I
B.
Q：What
C.She
D.
B.She
E.
C.She
F.
D.She

单项选择题

患者，男，72岁，肺心病10余年。3天前受凉，咳嗽、咳痰、呼吸困难加重，喘息严重呈端坐呼吸，双下肢水肿，护士观察患者时，为警惕肺性脑病的发生，应注意观察

A.体温
B.饮食状况
C.意识状态
D.皮肤、黏膜
E.尿量

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