A、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/c18fc463-2a18-4a0e-ba19-4d7228a96c35.jpg"title="ex_1259756202216_0.jpg" alt="ex_1259756202216_0.jpg"/>
B、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/db0c7391-bef7-4596-8caf-7bf14e22dc62.jpg"title="ex_1259756209966_0.jpg" alt="ex_1259756209966_0.jpg"/>
C、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/4de402e9-42c5-4935-981c-cb2bed94d870.jpg"title="ex_1259756217894_0.jpg" alt="ex_1259756217894_0.jpg"/>
D、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/abee254c-fc70-4060-a687-57e2a218991e.jpg"title="ex_1259756225582_0.jpg" alt="ex_1259756225582_0.jpg"/>