考博考试

根据网考网考试中心的统计分析，以下试题在2018/10/26日考博习题练习中，答错率较高，为：74%
【单选题】Most of the changes (occurred) in pattens of family planning (had taken place) before public family services were established and at (considerable) emotional and physical costs (to many couples).
网考网参考答案：A，答错率：74%
网考网试题解析：
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