“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

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问题选择题

“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

答案

答案：C

听力题

根据括号中所给的中文写出单词，使句子意思完整

小题1:After twelve hours’ work, I am too tired to join their ___________(讨论).

小题2:The Special Olympic Games include many events ____________(相似) to the games in Olympics. .

小题3:The purpose of Chinese Dream Show is to help people ___________(实现) their dreams.

小题4:Recycling is also a good way to reduce pollution. We should _________(分开) waste into different groups so that it can be recycled.

小题5:My mother was once a __________(秘书) of a big company, but now she just stay at home to look after me.

判断题

矿井储量动态数字台帐不是矿井地质所具备的基础资料。（）