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【单选题】
如果市场是有效的,则债券的平均收益率和股票的平均收益率 ( )A.
两者没有任何关系
B.
保持相反的关系
C.
大体保持相对稳定的关系
D.
大体保持相等的关系
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举一反三
【单选题】Which area of academic study is not mentioned by the speaker when he talks about scientific advances in 17th century Britain?
A.
Biology.
B.
Chemistry.
C.
Medicine.
D.
Astrology.
【单选题】Why do those promoters think the tanning machines are healthy?
A.
Because they are scientifically designed.
B.
Because they have high quality control.
C.
Because they can emit those harmful rays.
D.
Because they are comfortable.
【单选题】听力原文：Meditation is being recommended by more and more physicians as a way to prevent, slow or at least control the pain of chronic diseases like heart conditions, AIDS, cancer, and infertility. It is ...
A.
It relieves the pain of cancer.
B.
It counteracts the effect of depression.
C.
It has mystic elements.
D.
It has long been used as a cure-all.
【单选题】孕妇,29岁,尿HCG阳性,B超确诊为早孕,护士对其进行健康指导,正确的是
A.
32周后避免性生活
B.
休息时取平卧位
C.
28周后每天数胎动一次
D.
孕期可选择盆浴
E.
便秘时可使用泻药
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