A、p
B、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/9ac176c4-a3fb-4b96-938e-400acab0a96b.gif"title="ex_1257309438826_0.gif" alt="ex_1257309438826_0.gif"/>
C、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/a4c51907-0ed9-41cf-b028-cd1e709e89bf.gif"title="ex_1257309473411_0.gif" alt="ex_1257309473411_0.gif"/>
D、<IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/9d405071-bb85-41ba-b251-22909c7295aa.gif"title="ex_1257309492273_0.gif" alt="ex_1257309492273_0.gif"/>