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【单选题】
某人,自诉常常在起床坐起或下蹲后站起感觉头晕眼花,动作快时更为严重,曾出现晕倒现象。在医院查体测血压110/76mmHg,Hbl25g/L,他发生此现象的主要原因是A.
微动脉舒张
B.
贫血
C.
交感缩血管中枢的紧张性较低
D.
心迷走中枢的紧张性过高
E.
压力感受器敏感性降低
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反馈参考答案：
举一反三
【简答题】A．Those who have visual disabilities. B．Those who intend to become artists. C．Those who have no interest in painting. D．Those who have never taken art history before.
【简答题】A．Those who have heart attacks. B．Those who desire to lose weight. C．Those who have spare time. D．Those who have inactive jobs.
【单选题】—Hi, can I help you? —_____. [ ]
A.
Yes, please
B.
No, I can't
C.
Yes, I can
D.
You are welcome
【单选题】Who would like to visit Kauai?
A.
Those who love nature.
B.
Those who love city life.
C.
Those who love the comfort in a fine hotel.
D.
Those who love going shopping.
【单选题】— Can I help you? — _____ I want a sweater. [ ]
A.
No, thanks.
B.
Yes, you can.
C.
Yes, please.
【单选题】听力原文：Good morning. Can I help you? (4)
A.
Yes, I think you can help me out.
B.
No, I cannot do it for you now.
C.
Yes, I'd like to try that jacket.
D.
No, I don't like that jacket at all.
【简答题】A．Those who have more leisure time. B．Those who have heart attacks. C．Those who have erous jobs. D．Those who have inactive jobs.
【单选题】—Can I help you? — _____ . [ ]
A.
I need your help.
B.
Yes, please.
C.
I can't help you.
【单选题】—Can I help you? —________. [ ]
A.
Yes, I can
B.
Yes, please
C.
No, I can't
D.
Yes, I do
相关题目：
【单选题】—Hi, can I help you? —_____. [ ]
A.
Yes, please
B.
No, I can't
C.
Yes, I can
D.
You are welcome
【单选题】— Can I help you? — _____ I want a sweater. [ ]
A.
No, thanks.
B.
Yes, you can.
C.
Yes, please.
参考解析：
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