将曲线$y^2=4x$  按$\phi :\left\{\begin{array}{c}{x}^{\text{'}}=2x\\ 2y^{\text{'}}=y\end{array}\right.$  变换后得到曲线的焦点坐标为(   )

正在收看汉字听写大赛的肖强妈妈问肖强：“隶书、金文、小篆、甲骨文四种字体最先和最后出现的是哪两种？”其正确的回答应是（    ）

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Everybody wants to be healthy. You know food is very important. There are lots of healthy food. You can have more bananas, apples, oranges, tomatoes and lettuce because fruit and vegetables are good for you. But don’t eat too much chocolate. It’s not healthy food. Healthy food can make you grow (生长) and make you strong（强壮的） and happy. Remember there is a saying—“An apple a day keeps the doctor away（远离）”. Sports can also keep you healthy. Get up early and do some sports every day. Don’t be lazy（懒惰的）. You will be healthy and happy.