最新题目
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___________[A] around [B] over [C] on [D] up..
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价值系数等于成本系数除以功能系数。()..
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___________[A] life [B] existence [C] survival [D] maintenance..
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___________[A] when [B] once [C] while [D] whereas..
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_________[A] searching [B] strolling [C] crowding [D] wandering..
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_______________[A] lodging [B] shelter [C] dwelling [D] house..
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