()是根据专家的判断或调查者的主观判断来决定选取的样本
A.简单随机抽样法
B.任意抽样法
C.分层随机抽样法
D.判断抽样法
参考答案:D
太阳光是一种电磁波,波的长短不同,因而产生了不相同的颜色。
—Could I have ____ dumplings?
—I'm sorry. We don't have ____ dumplings here. [ ]
A. some, some
B. any, some
C. some, any
D. any, many