阅读短文，下列问题

    Everybody wants to be healthy. You know food is very important.There are many healthy foods. You can have more bananas, apples, oranges,tomatoes and lettuce because fruits and vegetables are good for you. But don't eat too much chocolate. It's not good for you. But don't eat too much chocolate. It's not good healthy food. Healthy food can make you grow and make you strong and happy. Remember there is a saying, “An apple a day keeps the doctor away.” Sports can also keep you healthy. Get up early and do some sports every day. Don't be lazy! You will be healthy and happy.

按要求改写句子。

①这些金字塔是古埃及文化的象征。（缩写句子）

②维也纳是圣地。（扩写句子，至少两处。）

③美国位于科罗拉多大峡谷的西部。（修改病句）

④德国和维也纳是音乐之都。（修改病句。）

我国实施“全面二孩”的主要目的是（　　）

按要求作图：

如图，在同一平面内有四个点A、B、C、D．

①画射线CD；②画直线AD；③连结AB；④直线BD与直线AC相交于点O．