多项选择题

关于抽样调查,下列表述正确的是( )。
A、抽样时应遵循随机原则
B、使用场合不同
C、抽样容量的确定不同
D、抽样误差的测定不同

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未分类题

To others and themselves the British have a reputation for being conservative not in narrow political sense, but in the sense of adherence to accepted ideas and unwillingness to question them. The reputation comes partly from their【C1】______. For 900【C2】______they have suffered【C3】______invasion nor revolution(except in 1649【C4】______1688)nor disastrous defeat in【C5】______. Their monarchy(君主政体)survives【C6】______serious question. Under its nominal【C7】______the political arrangements have been【C8】______stable that, except for the【C9】______interruptions in the seventeenth【C10】______, they have been adapted throughout【C11】______centuries to meet changing needs without violent【C12】______. Britain, in 1978, was【C13】______in managing without【C14】______written constitution; some fragmentary definitions of 1688 still【C15】______. There had been【C16】______quarrels, social and economic as well【C17】______political, but the quarrels had been【C18】______, usually【C19】______compromisE.The underlying【C20】______had not been broken.【C1】A.languageB.futureC.historyD.literature

A.【C1】
A.language
B.future
C.history

未分类题

The last word of the passage 'them' refers to ______.A.rulesB.actionsC.personal rightsD.privileged positions

A.A.rules
B.actions
C.personal
B.privileged

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