求函数y=$\sqrt{\tan x-1}$+lg（cosx﹣$\frac{1}{2}$）的定义域．

My sister likes playing_____guitar and she also likes playing______soccer.

①奇函数的图象一定通过原点

②函数y=$\sqrt{x^2-1}+\sqrt{1-x^2}$是偶函数，但不是奇函数

③函数f（x）=a^x﹣1+3的图象一定过定点P，则P点的坐标是（1，4）

④若f（x+1）为偶函数，则有f（x+1）=f（﹣x﹣1）

⑤若函数f（x）= $\{\begin{array}{c}{a}^x\left(x＞1\right)\\ \left(4-\frac{a}{2}\right)x+2\left(x\le 1\right)\end{array}$ 在R上的增函数，则实数a的取值范围为4，8）

其中正确的命题序号为____．

    Jack and Anna are good friends. They are Chinese. Jack likes sports very much. He can play volleyball , basketball and football . Anna likes music very much . She can't play ball games. But they both like playing on computers . They like eggs , bread and milk for breakfast . For lunch , Anna likes eating vegetables and fruit , but Jack likes chicken and fish . They both like hamburgers .But they don't like ice cream or rice.