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For a small beginning, it has __________ (发展) into a big international company.
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Experts believe________people can waste less food by shopping only when it is necessary.
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There are ______ many people in the room. [ ]
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“英子,不要怕,______什么困难的事,_____硬着头皮去做,_____闯过去了。”
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max Z=2X1+4X2-5X3 X1+X2+X3=7 2X1-3X2+X3≥10 X1.X2.X3≥0
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