A、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/5d6e0aab-80b5-4438-90d5-2e58d4126c63.jpg"title="ex_1427178122016_0.jpg" alt="ex_1427178122016_0.jpg"/>
B、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/7a07b7d7-1967-4308-a152-46c4654f2d77.jpg"title="ex_1427178143758_0.jpg" alt="ex_1427178143758_0.jpg"/>
C、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/f18ad9c7-2de8-4542-bb92-5f4981460f43.jpg"title="ex_1427178159446_0.jpg" alt="ex_1427178159446_0.jpg"/>
D、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/25a8ae50-eee2-4f78-8329-b7abc8f18a09.jpg"title="ex_1427178179013_0.jpg" alt="ex_1427178179013_0.jpg"/>