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【判断题】
当所有产地的产量和销地的销量都是整数时，运输问题的基可行解也是整数。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】The meeting will begin at 9: 00 according to the _________.
A.
calendar
B.
column
C.
schedule
D.
diagram
【简答题】Our school library offers learning services, books and other things that help all members of the school to become good thinkers and clever users of information. It is linked (连接) to the larger library...
【简答题】According to a new Ministry of Education survey, students’ safety has become a big problem. Nearly 50 percent of students say they are worried about robbery(抢劫) on the way to and from school. Now in m...
【简答题】简述蛋白质的a-螺旋和b-折叠。
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