下面是四种与光有关的事实，其中与光的干涉有关的是（   ）

双曲线C的中心在原点，右焦点为F($\frac{2\sqrt{3}}{3}$,0)，渐近线方程为y=$\pm \sqrt{3}$x．

（Ⅰ）求双曲线C的方程；

（Ⅱ）设直线l：y=kx+1与双曲线C交于A、B两点，问：当k为何值时，以AB为直径的圆过原点．

用所给动词的正确形式填空

    What a day! Yesterday, Ben____(run) to the bus stop. He____(drop) his schoolbag. He ____(pick) it up quickly but he didn't____ (pick up) his homework. He missed the bus so he ran to school.  Tony ____(find) Ben's homework and ____(shout) but Ben didn't____ (hear) him. He ____(carry)Ben's homework to school. There were lots of students at school.

  "I must ____(find)Ben!" said Tony. "BEN!"

  "Tony, you mustn't ____(shout) here."

  "Sorry, Miss Jiang. Can you see Tony?"

  "Yes, he's over there."

  "Thanks. "

  Tony ____(find) Ben and____ (give)him his homework.

  "Thanks a lot, Tony."

  "No problem, Ben."

如表的四种植物中，哪两个物种的亲缘关系最近？（   ）