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【单选题】
OR的流行病学含义为A.
病例组中某因素的暴露比值是对照组的暴露比值的多少倍
B.
暴露因素的发病率
C.
因素与疾病之间是否相关
D.
暴露组与非暴露组发病比值
E.
说明点估计值的可信度
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【单选题】听力原文：Narrator Listen to part of a conversation between a student and a professor. Student How are you, Professor Smith! Professor How are you, Gillian! Anything I can do for you? Student Well, I know ...
A.
To inform. people of the aging process.
B.
To make people aware of the side effects of aging.
C.
To inform. people of the discomfort with old age.
D.
To make people change their idea about old age.
【单选题】______ abroad for years, the old professor returned tothe place where he was grew up.
A.
Having been
B.
Being
C.
Tobe
D.
To having been
【多选题】狭义外汇是指以外币表示的，可直接用于清偿国际问债权的支付手段。下列属于狭义外汇的是( )。
A.
美元现钞
B.
欧元现钞
C.
美元远期汇票
D.
英镑支票
E.
美元债券
【单选题】在6度分带中,A点的高斯坐标为(112240m,20500000m),则A点所在别为()
A.
39带,117°
B.
20带,120°
C.
20带,117°
D.
39带,120°
【单选题】It was not until 1978_____ set free from the prison.
A.
that the old professor was
B.
did the old professor
C.
was the old professor
D.
that was the old professor
【单选题】______, the old professor is still trying to learn a foreign language.
A.
However he is old
B.
Old as he is
C.
He is so old
D.
As is he old
【简答题】一艘敌舰正以 v 1 = 12 m /s 的速度逃跑,飞机在 320 m 高空以 v 2 = 105 m /s 的速度同向追击.为击中敌舰,应提前投弹.求飞机投弹时,沿水平方向它与敌舰之间的距离多大?
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