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【单选题】
请从以下选项中，选出所述内容是正确的A.
任何线性规划问题存在并具有惟一的对偶问题
B.
线性规划问题可以存在多个对偶问题
C.
有的线性规划问题不存在对偶问题
D.
以上都不对
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Now many people_____higher degrees probably finish up nowhere when they try to get a highly－paid
A.
16. Now many people_____higher degrees probably finish up nowhere when they try to get a highly-paid job. A．with
B.
in
C.
for
D.
At
【判断题】Many people now try to avoid conveying emotions by communicating electronically.
A.
正确
B.
错误
【判断题】Many people now try to avoid conveying emotions by communicating electronically.
A.
正确
B.
错误
【简答题】Experts generally agree ...
【单选题】Experts generally agree that diet has an important bearing on one's health.
A.
result
B.
factor
C.
cause
D.
influence
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