单选题
2分
![](https://static.yktong.net/courses/batches/1/796/images/9af58ddc4f04610e68973e7961d8fa22.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/7a5e6aaa02df361f9a9d55788e7282a7.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/bb0937c6ffd5b0462a343d69b85df64c.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/740573c987fe701a00855ba14490fc53.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/9af58ddc4f04610e68973e7961d8fa22.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/7a5e6aaa02df361f9a9d55788e7282a7.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/bb0937c6ffd5b0462a343d69b85df64c.jpg)
![](https://static.yktong.net/courses/batches/1/796/images/740573c987fe701a00855ba14490fc53.jpg)
参考答案: C