单选题
2分
![](https://static.yktong.net/courses/batches/1/796/images/f014ac5f5887071e58883b825b874dde.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/f014ac5f5887071e58883b825b874dde.jpg)
参考答案: C