题目2A. <img src="https://tihai-oss-cloud.itihey.com/img/216e451e2f2bae0d90d5c7ee4f8ee04c.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/40f5071b98fc771b0c913c9e303796c0.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/145f2ddf380b01dd726c8d2e359a4360.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/8787d6d9f5fbfbfe0a8262caa3a9de7d.png">