【单选题】Mom always tells me to work more so that I can have more time to play and relax.
【单选题】已知双曲线 的两个焦点分别为F 1 ,F 2 ,P为双曲线上的一点,且∠F 1 PF 2 = 90°,则 的值为 [ ]
【单选题】Napoleon would have taken over the world if he ______ the Battle of Waterloo.
【单选题】He considered it his good ___ to have won her love.
【简答题】Michael Jordan was one of the most important basketball players in the world during the 1990s.He won the NBA’s Most Valuable Player Award five times.Jordan led(带领)the Chicago Bulls to his first there ...
【多选题】使用利用处理法处理顾客异议时应该注意以下问题( )
【单选题】已知双曲线的两个焦点为F 1 (- 10 ,0)、F 2 ( 10 ,0),M是此双曲线上的一点,且满足 M F 1 ? M F 2 =0,| M F 1 |?| M F 2 |=2,则该双曲线的方程是( )
【简答题】已知双曲线 的两个焦点为 、 点 在双曲线C上. (1)求双曲线C的方程; (2)记O为坐标原点,过点Q (0,2)的直线l与双曲线C相交于不同的两点E、F,若△OEF的面积为 求直线l的方程.