A、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/8d9183c3-231b-4f9f-8a96-56671bdfe500.jpg"title="ex_1257491957229_0.jpg" alt="ex_1257491957229_0.jpg"/>
B、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/5474260c-204a-4283-99e3-d448cf49e4fd.jpg"title="ex_1257491965468_0.jpg" alt="ex_1257491965468_0.jpg"/>
C、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/d94e6d4a-8b09-4959-a4e4-ad8d50a0a3e4.jpg"title="ex_1257491973521_0.jpg" alt="ex_1257491973521_0.jpg"/>
D、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/718a87d3-dc70-45e9-b3e7-956c87633e96.jpg"title="ex_1257491984726_0.jpg" alt="ex_1257491984726_0.jpg"/>
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