“观察DNA和RNA在细胞中的分布”实验中，正确的操作步骤是①染色　②水解　③冲洗涂片　④取口腔上皮细胞制片　⑤观察

题干

“观察DNA和RNA在细胞中的分布”实验中，正确的操作步骤是
①染色　②水解　③冲洗涂片　④取口腔上皮细胞制片　⑤观察

A：④①②③⑤

B：④②①③⑤

C：④②③①⑤

D：④⑤①③②

上一题下一题 0.0难度选择题更新时间:2015-03-13 06:12:20

C

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