题目2A. <img src="https://tihai-oss-cloud.itihey.com/img/906830e46268373b9c989077c8785500.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/bef5fdc9e755c3ba0cfdeabc756cef59.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/7e8f811cfad694b5f7718a2b2b1f199a.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/788d2e03e531f7a490def9228c459e6f.png">