Is a ___ answered by 500 people truly re_爱下问搜题

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问题选择题

Is a ___ answered by 500 people truly representative of national opinion?[ ]

A. millionaire

B. questionnaire

C. problem

D. question

答案

答案：B

选择题

Thanks _____ the photo of your family．

A．of

B．for

C．it’s

D．and

单项选择题

最早定殖到获得性膜上的细菌是（）。

A.血链球菌

B.轻链球菌

C.变形链球菌

D.乳杆菌

E.放线菌