晚期囊胚透明带消失后，相当于受精后第几日开始着床A．2～3日 B．4～5日 C．6～

用所给单词组成句子。

1．she, be, a, an, actor, now, is, but, she, wants to, worker

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2．for, your, do, what, bank, can, you

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3．in, her, meeting, she, small, likes, people, office

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4．TV station, a job, a reporter, on, gives, our, the wanted ad, as

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5．wants, good, when, he, sports coach, 23 years old, Bill, a, to be, is

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400V电源中断的现象、原因是什么？

价、量是技术分析的基本要素，一切技术分析方法都是以价、量关系为研究对象的，目的就是分析、预测未来价格趋势。( )

使用饮水机，为什么要及时断电和更换水桶？