单项选择题

如果需求增长为原来的k倍,则经济订货批量变为原来的(    )倍
A、k
B、 k/2
C、
D、

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16.What should we do first when we make mistakes? We should acknowledge them . 17.What does the speaker advise us not to do when we make mistakes? We shouldn't them and hope they will go away. 18.Why should we say sorry when we mess things up? Because it can show our . 19.What can leave a good impression when we make mistakes? Thinking of to make it up. 20.What will happen if we don't do what we have said? People won't take the seriously next time.
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歌曲《我和你》在奥运会开幕式首唱是由中国歌手( )和英国歌手( )演唱
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