题目7单选题
一阶线性微分方程 <img src="https://tihai-oss-cloud.itihey.com/img/6f37c6cc138a291d06fdabfdec6e7d1d.png">的通解是( )A. <img src="https://tihai-oss-cloud.itihey.com/img/5225782d82a0bce07190d61c8b2c457e.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/e3982748cd5177a3954c3edaeea639af.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/f2f64e338843c25cce8509dfe46cc5dd.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/780cc5767faef838f1006db16e32dde4.png">