题目类型：
单选题
题目内容
正确答案
A
题目解析
<img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/1c/7c/1c7c4afedd2e98f91aa52073f9235188.png" style="width: 100%;height: auto;"><img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/61/86/61860f7c53de37461c434989e11f61ed.png" style="width: 100%;height: auto;">