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

搜题请搜索小程序“爱下问搜题”

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

填空题

将下列四个方位词填在相应的方框内。（只填序号）

A. west B. south C. east D. north

选择题

如图所示生态系统中，共有（　　）条食物链．

A．1

B．2

C．3

D．4