题目8单选题
下面程序中有停止作用的是().<img src="https://tihai-oss-cloud.itihey.com/img/7ea90fe8c9b55b8331cd536b3f0fdebe.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/118daa22de4735ef9cc795530885cb93.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/68bd92b5541bd294b5c833e3065cf4d1.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/9b8ab23909272e54f6842d1f056ce179.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/c628160eacfa5d8bd6deaa104974586d.png">