给出下列命题：

①存在实数x，使得sinx+cosx=$\frac{3}{2}$；

②函数y=2sin（2x+$\frac{\mathrm{\pi }}{3}$）的图象关于点（$\frac{\mathrm{\pi }}{12}$，0）对称；

③若函数f（x）=ksinx+cosx的图象关于点（$\frac{\mathrm{\pi }}{4}$，0）对称，则k=﹣1；

④在平行四边形ABCD中，若|$\overrightarrow{BC}$+$\overrightarrow{BA}$|=|$\overrightarrow{BC}$+$\overrightarrow{AB}$|，则四边形ABCD的形状一定是矩形．

则其中正确的序号是____ （将正确的判断的序号都填上）

完形填空。

   1! My name  2Alice. I'm fourteen  3  . I like playing Volleyball  4 going to the cinema. My favourite5  is Christmas.

    This is my friend Joe. He's fifteen. He   6  like playing sport. He can7  English and he likes Maths. He wants8   everything about it.

    This is my cousin. She is thirteen.   9 favourite sport is skating and she can skate very   10   . She likes music. She says it's exciting.