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【单选题】
为提高诊断试验的灵敏度与特异度,可采用联合试验,关于串联试验下面说法正确的是( )A.
用一系列诊断试验，只要有一阳性即诊为阳性
B.
用一系列诊断试验，只有全部结果为阳性才定为阳性
C.
同时做几项诊断试验，只要有一阳性时也可判为阳性
D.
同时做几项诊断试验，只有全部为阳性时才判为阳性
E.
以上均不对
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【单选题】He is so addicted to smoking that ________ seems to be no chance of talking him into quitting.
A.
this
B.
what
C.
it
D.
there'
【简答题】什么是晶体的缺陷?晶体在结构上有哪些缺陷?
【单选题】He told the boys________________.
A.
made so much noise
B.
not to make so much noise
C.
not to made so much noise
D.
not make so much noise
【单选题】He is talking so much about America as if he ____ there.
A.
had been
B.
has been
C.
was
D.
been
【简答题】晶体在结构上有哪些缺陷?
【简答题】Talking on a mobile phone is expensive, so a lot of people send text messages. Text messages are much cheaper than talking on a mobile phone, and you can make it cheaper by the words shorter. Y...
【简答题】A．Because he is so tired. B．Because he works late at night. C．Because he has eaten so much at night. D．Because he sleeps late at night.
相关题目：
【单选题】He is talking so much about America as if he ____ there.
A.
had been
B.
has been
C.
was
D.
been
参考解析：
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