When is __________ birthday?[ ]
A. your father
B. your father's
C. you father's
答案:B
火电厂低厂变采用设置哪些保护?
应用多因素分析可以控制的偏倚是()
A.选择偏倚
B.信息偏倚
C.混杂偏倚
D.报告偏倚
E.失访偏倚