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【判断题】
对于 m 个产地, n 个销地的产销平衡运输问题,用表上作业法求解时,调运方案中数字格的个数为 m+n 。A.
正确
B.
错误
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举一反三
【单选题】听力原文：M：Don't forget the show will start at seven o'clock at the People's Theater．I'll meet you at the gate． W：Well，if you don't see me at seven，I will be doing my homework and in that case，you can go ...
A.
She doesn't know where the People's Theater is.
B.
She doesn't think the show will start at seven.
C.
She has homework to do before she goes to the show.
D.
She promises to meet the man at the gate.
参考解析：
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