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【单选题】
下列关于检测病毒感染产生的抗体说法错误的是A.
IgM抗体出现在病毒感染的早期
B.
IgG需采集急性期和恢复期双份血清恢复期
C.
IgG效价必须比急性期增高4倍或4倍以上时，诊断意义
D.
利用特异性的抗原检测病毒感染者血清中IgM和IgG抗体
E.
标本的采集时间对IgM的检测结果影响不大
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【简答题】There are two types of twins; identical and non-identical twins. Identical twins are formed from a single egg in mother’s body which divides to from two separate babies. Identical twins look the same,...
【单选题】Twins often show great ______, but these twins are an exception.
A.
likelihood
B.
resistance
C.
resemblance
D.
contradiction
【单选题】— Could you tell me ? — They are from Canada. [ ]
A.
where are the twins from
B.
where the twins are from
C.
where were the twins from
D.
where the twins were from
【单选题】(2012)对职业人群进行医学监护的内容不包括A、定期体检B、就业前体检C、职业有害因素监测D、离岗或转
A.
对职业人群进行医学监护的内容不包括 A、定期体检
B.
就业前体检
C.
职业有害因素监测
D.
离岗或转岗时体检
E.
职业病的健康筛检
【单选题】The computer on the desk is ______. [ ]
A.
twins
B.
the twin's
C.
the twins
D.
the twins'
【单选题】The passage seems to concentrate on ______.
A.
how twins are born
B.
how twins grow up
C.
characteristics of identical twins
D.
ways to distinguish twins
【单选题】'Whose bikes are these?' 'They are _____.' [ ]
A.
the twins
B.
the twins'
C.
twins
D.
twin's
【简答题】自身溶血试验的纠正试验是指加入____或____后,观察溶血是否纠正。
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