问题
选择题
如果命题“坐标满足方程f(x,y)=0的点都在曲线C上”不正确,那么以下命题正确的是( )
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答案
答案:D
如果命题“坐标满足方程f(x,y)=0的点都在曲线C上”不正确,那么以下命题正确的是( )
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答案:D
阅读理解。 | ||||||||||||||||||||||||||
( ) 1. Mollie plays chess, but Simon doesn't play chess. ( ) 2. Jack doesn't play TV games, Simon doesn't play TV games, either (也). ( ) 3. Simon watches TV. Mollie watches TV, too. ( ) 4. Jack doesn't watch TV. Mollie doesn't watch TV, either. ( ) 5. Mollie doesn't sleep a lot. Jack doesn't sleep a lot, either. |