--- Is it true that Mike refused an offer from Yale University yesterday?

--- Yeah, but I have no idea _______ he did it; that’s one of his favorite universities.

A．when

B．why

C．that

D．how

在临床医学研究前，对无行为能力的病人要获得他家属的同意，这属于

A．欺骗、威胁、利诱进行人体实验违反道德和法律
B．负担和受益要公平分配
C．受试者与研究者之间应保密
D．死亡者家屑有权获得赔偿
E．需获得伦理专家委员会(或主管部门)的批准