A、4
B、<br/><IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/62396fc3-1e6b-42ca-b8a5-053f65ef310c.gif"title="10910195850_7b.gif" alt="10910195850_7b.gif"/>
C、<br/><IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/0f78db2c-3735-4abc-b064-c19083d1fb41.gif"title="10910195910_73.gif" alt="10910195910_73.gif"/>
D、<br/><IMG src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/0be14f8d-7106-42d7-9b1c-85e3423b7966.gif"title="10910195925_74.gif" alt="10910195925_74.gif"/>