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【简答题】
在用图解法求解线性规划问题时,如果取得极值的等值线与可行域的一段边界重合,则最优 。
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举一反三
【简答题】They have come to the conclusion ________ this winter will be even colder than before. A: that B; for C; which
【简答题】Mary received ________ many postcards at Christmas. A．so B．such C．too D．even
【单选题】听力原文：W: Mary works much harder than Joe. M: But Jim works even harder than Mary. Who works the hardest?
A.
Jim.
B.
Mary.
C.
Joe.
D.
Both Jim and Mary.
【单选题】_______ with her sister, Mary is even more hardworking and better at her lessons.
A.
Compare
B.
To compare
C.
Comparing
D.
Compared
【简答题】A．Even if B．Until C．Given that D．Before
【简答题】Before Mary even finished telling the joke, I couldn't help but burst ________ laughter .
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