题目2A. <img src="https://tihai-oss-cloud.itihey.com/img/78c26f3734feba57723f9ce97ecada20.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/e9919abf76d687cbaae744084fe14d77.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/cd8fa6ab566cae8a78f0e74e7796ee45.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/db76fa8361b544d0d5a7373167f17333.png">