主观抽样是调查者根据研究的目标和自已主观的分析，来选择和确定样本的方法。它又可分为（）和（）两种。
参考答案：印象判断抽样；经验判断抽样
用括号内所给单词的适当形式填空。
1. When I arrived at the park, I saw those children ______(play) football on the grass.
2. The headmaster asked us _____(not be) late for school.
3. Can you tell me how _____(get) to the Children Palace?
4. He will call you back as soon as he _____(come) back.
5. The Green family live in the ____(center) part of the village.
斯宾塞是英国著名的 ______ 哲学家和科学教育的倡导者。 ( )
A．唯物主义
B．唯心主义
C．辩证唯物主义
D．机械唯物主义
ball on the grass. 
the
village.