设等差数列{a_n}的前n项和为S_n，且S₄=4S₂，a_2n=2a_n+1．

函数y=-kx与$y=\frac{k}{x}\left(k\ne 0\right)$的图象的交点个数是（   ）

下列图示，不能正确反映化学反应原理的是（  ）

在平面直角坐标系中，直线y=kx﹣2经过点（1，﹣4），求不等式kx﹣2＞0的解集．

阅读理解，判断对错，并在横线上写出正确的内容
  Thursday，June 1st
    Today is a special day for me. Because it's my last Children's Day. We're going to graduate(毕业) from the primary school. We had a big party in our classroom. Girls cleaned the room. Boys decorated(装饰)the room with pictures and balloons. There were many drinks，food，fruits and gifts. We were all very excited.
    We had a good time in the party. Lucy played the guitar. John did a kung fu show. We sang，danced and played with each other. We ate the cakes and took many pictures. We didn't want to say goodbye to our friends or teachers. How time flies!