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”是方程“
”表示双曲线的( )已知变量a，b已被赋值，要交换a、b的值，采用的算法是（）
| A．a="b," b="a" | B．a="c," b="a," c="b" |
| C．a="c," b="a," c="a" | D．c="a," a="b," b=c |
，
为
的导函数，令
，
，则下列关系正确的是( )
的焦点为F,准线为
，P为抛物线上一点，
，A为垂足，如果直线AF的斜率为
，那么
（）
16
=4+2Δx
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推荐套卷
已知变量a，b已被赋值，要交换a、b的值，采用的算法是（）
| A．a="b," b="a" | B．a="c," b="a," c="b" |
| C．a="c," b="a," c="a" | D．c="a," a="b," b=c |
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