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/84/5f/845f01c47fdffca0acb273cadbf3d08a.jpg" style="width: 100%;height: auto;"><img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/bd/2a/bd2a117679af6aa20c83b9b07ea39c39.jpg" style="width: 100%;height: auto;">