A、<p><IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/9c9bf7f1-c54d-42b1-a695-528aed99e555.gif"title="ex_1303455349117_0.gif" alt="ex_1303455349117_0.gif"/></p>
B、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/ee4b78af-015c-44db-b6dc-e79e2cf4949c.gif"title="ex_1303454068297_0.gif" alt="ex_1303454068297_0.gif"/>
C、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/81a296ba-13fb-42f8-bc46-b93198a48e44.gif"title="ex_1303455377740_0.gif" alt="ex_1303455377740_0.gif"/>
D、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/5c47f4db-31c7-44cc-9d42-10c26d6b5fc4.gif"title="ex_1303455400393_0.gif" alt="ex_1303455400393_0.gif"/>