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【单选题】
研究者拟从l00个学生名单中抽取20人作为样本进行相关研究，如果从第三位开始抽取，按照3、8、13、18、23……的形式连续抽取，直到抽满20人为止。这种取样方法是()A.
简单随机取样
B.
分层随机取样
C.
整体随机取样
D.
等距随机取样
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【单选题】Martin Goldsmith believes that computer music has not yet been widely accepted because ______.
A.
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B.
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C.
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D.
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