根据NCCLS的建议,欲建立某方法检测肿瘤标志物的参考值,比较合适的标本数至少为()
A.10
B.40
C.80
D.120
E.150
参考答案:D
I am coming home to Canada ________ February sixth.[ ]
A. on
B. to
C. in
D. for
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