题目1单选题
微分方程 <img src="https://tihai-oss-cloud.itihey.com/img/b27c4b77ea2c9fc7b867f371eb108ffd.png">的通解是()A. <img src="https://tihai-oss-cloud.itihey.com/img/df8f3c6ed2ce6eaeb1787301c0507332.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/b41ab965518197fbe9f0e51ff112dd3c.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/f0981827a96e938067c008f6e49d7ddb.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/f1c13121d0fc8242658e73669d6e5059.png">