题目2A. <img src="https://tihai-oss-cloud.itihey.com/img/fb02554b853cc1490ed5205e7b2d02f9.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/88a4cfdb7f637912c9cd9b96a0ff9cf3.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/1e1d89fc96c393c247e740c3e8b794a7.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/273521675524f98f65e88cb5a9de31f4.png">