题目2单选题
<img src="https://tihai-oss-cloud.itihey.com/img/4a5cdb87f94b86b659b7086a2d4c75aa.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/496d83b50f9c768701748b4c7552a014.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/14e09770a0ca5d750b09c6fcd93b813a.png">C. (3,<img src="https://tihai-oss-cloud.itihey.com/img/17b97d11480fc44ef33519bd316edeca.webp">6,1)D. (-3,<img src="https://tihai-oss-cloud.itihey.com/img/191845134d13651c53f4a86cb7a52e0d.webp">6,-1)