20世纪初期,抽样方法逐渐发展起来,与()和()结合在一起,形成抽样调查,成为现代社会调查研究的主要标志.
参考答案:问卷法;统计分式
Do you know_____ to the cinema?[ ]
A. which is way the nearest
B. which is the nearest way
C. which way the nearest is
D. which the nearest way is
导向装置选用和设计的原则有哪些?