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【单选题】
某医生检测头颈部恶性肿瘤者33人与正常人群70人的EB病毒抗体阳性率,结果前者阳性数10人,后者阳性数9人,若问两者的阳性率有无差别,应计算什么统计量( )A.
u检验
B.
C.
D.
E.
A与C均可
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【单选题】It is none of my business. It's up to you to decide he bought yesterday is used for.
A.
what what
B.
what that
C.
that what
D.
that which
【判断题】S taffing decide what objectives to pursue during a future period and what to do achieve those objective.
A.
正确
B.
错误
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【单选题】Let's put our heads together and _____a plan of action. [ ]
A.
decide to
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decide in
C.
decide on
D.
decide at
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A.
decide about
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decide against
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A.
he's painting
B.
he's sweeping the deck
C.
he's testing the alarms
D.
he's repairing the radio
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