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充分又必要条件
释义
充分又必要条件
chōng fèn yòu bì yào tiáo jiàn
如果有甲必有乙,无甲必无乙,那么甲就是乙的充分又必要条件。例如,三角形是等角的,则三角形是等边的,而只有三角形是等角的,三角形才是等边的。因此,三角形等角就是三角形等边的充分又必要条件。
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Accidents,Nuclear Reactor
Accidents,Occupational
accidents of coal mine
accidents of coal mines
Accidents often arise from carelessness
accidents of the ground
accidents of the sea
accidents on bridgehead
accidents on bridge head
Accidents on site are few
accident source term
accident spot
accident spot map
accidents prediction
accidents prevention
accidents probability
Accidents,Radiation
accidents reason
accidents reconstruction
accidents resulted from covered ice
accidents signal
accidents stem from carelessness
accident statistic
accident statistics
accident stimulus
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更新时间:2025/4/6 8:57:19