已知$f\left(x\right)=\left\{\begin{array}{c}{\log }_{\frac{1}{2}}x,x>0\\ 2^x,x\le 0\end{array}\right.$，则$f\left(-2\right)$的值是 (    )

    My name is Anna.I have my lunch at school from Monday to Friday.I like my school lunch.On Mondays we have hamburgers and milk.On Tuesdays and Fridays we have tomato noodles and beef.I like Wednesdays because we often have sandwiches on Wednesdays.On Thursdays we often have noodles.

根据短文内容判断句子的正误。

我国地势西高东低，呈阶梯状分布；地形多种多样，山区面积广大。据此完成下列各题。