如图所示，是水平地面上静止的足球，请画出足球对地面压力的示意图．

根据短文内容判断下列句子正误。
    My name is Amy. Tomorrow is Saturday. My parents aren't going to work, but we are going to be very busy tomorrow. My mother is going to buy something. I'm going to the bookstore in the morning. Then I'm going to buy a dictionary.
    Tomorrow evening we are going to visit my grandparents and have a big dinner. After that we are going to the cinema. I think we are going to have a nice weekend.

如图为人体循环系统的部分结构示意图，据图回答．

下列有关语法的表达有误的一项是（     ）

After that, he knew he could _______ any emergency by doing what he could to the best of his ability.