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【简答题】
已知 是某产品的总成本 （）与产量 （台）之间的函数关系式，若每台产品 的售价为25，则生产者不亏本（销售收入不小于总成本）时的最低产量是 .
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举一反三
【多选题】要约在下列哪些情形时失效？（）
A.
拒绝要约的通知到达要约人
B.
要约人在受要约人承诺后撤销要约
C.
承诺期限届满，受要约人未作出承诺
D.
受要约人对要约的内容柞出实质性变更
【简答题】When discussing transportation, what should be taken into consideration?
【单选题】Meanwhile, an uncaring public barely watches, convinced that the issue has no significance, and publicity-conscious senators and politicians increasingly give way to the lobbying of animal rights acti...
A.
At the same time, th e general public seldom act like bystanders, believing that the issue is important . The senators and politicians keep concessions to activists advocating animal rights.
B.
At the same time, the general public barely act like bystanders, believing that the issue is no big deal. The senators and politicians, who are familiar with the public issues, keep concessions to activists who advocat e animal rights.
C.
At the same time, the general public act like bystanders, deny ing that the issue is no thing important . The senators and politicians, who are familiar with the public issues, keep concessions to activists who advocat e animal rights.
【简答题】理解 是 “理解政治经济学的枢纽”。
【简答题】设有关系模式R(运动员编号,比赛项目,成绩,比赛类别,比赛主管),用来存储每个运动员参加各项比赛的成绩以及各项比赛所属的类别和主管。如果规定:每个运动员参加一个比赛项目,只有一个成绩;每个比赛项目只属于一个比赛类别;每个比赛类别只有一个比赛主管。试回答下列问题: (1) 根据上述规定,写出关系模式R的基本函数依赖和候选码。 (2) 在函数依赖范畴内关系模式R最高属于第几范式?为什么? (3) 如果...
【单选题】Any American who has bought a pack of cigarettes since the mid-60s might have seen the health warnings. It says, 'SURGEON GENERALS WARNING: Smoking Causes Lung Cancer, Heart Disease, And May Complicat...
A.
in fact
B.
of course
C.
sort of
D.
by chance
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