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【多选题】
某高校想了解在校本科生对课程教学的满意程度，设计并实施了一项抽样调查。现已知如下与调查有关的信息：该校共有本科生15000人，学校教务部门可以提供所有在校本科生的花名册，调查设计样本量为800。调查找到并成功访问到了760名调查对象。问卷调查结束之后，对回收上来的问卷进行整理、录入，发现共回收有效调查问卷752份。调查问卷使用量表法对课堂教学满意度进行测量，在对数据进行了简单清理之后，试图估计在校本科生对课程教学的满意度情况。该调查设计与执行过程中，可能会存在着以下哪些种误差类型？A.
覆盖性误差
B.
无应答误差
C.
抽样误差
D.
测量性误差
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【单选题】In the old days, children were familiar with birth and death as part of life. This is perhaps the first generation of American youngsters who had ever been close by during the birth of a baby and ever...
A.
were quite unfamiliar with birth and death
B.
had often experienced the fear of death as part of life
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usually witnessed the birth or death of a family member
D.
were often absent when a family member was born or dying
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