问卷法中,开放式问题的优点有
A.收集的资料只能进行定性分析
B.难以进行定量处理
C.回答者可以按白己的方式发表意见和看法
D.不受问卷形式的限制
E.所获得的资料生动、丰富
正确答案是CDE
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Passage One The ups and downs of life may seem tohave no predictable plan. But scientists now know there are very definite lifepatterns that almost all people share. Today, when we live 20 years longer thanour great-grand