非正常验收有四种形式：返工更换验收、检测鉴定验收、设计复核验收、加固处理验收。其中，两种以上情况不能满足要求的即可拒绝验收。( )
参考答案：错
目前细菌检查最重要的确诊手段（）
A.抗原检测
B.细菌培养
C.细菌遗传物质检测
D.抗体检测
E.直接涂片镜检
— My father _____ Shanghai with my grandparents.
— Really? _____ will they come back? [ ]
A. has been to; How soon
B. has gone to; How soon
C. has been to; How long
D. has gone to; How long
