皮皮学，免费搜题
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【多选题】
皮肤暴露在空气中,( )等混杂在一起附着于皮肤表面形成污垢,会堵塞皮脂腺和汗腺,影响皮肤正常生理功能的发挥,甚至引起皮肤病变,因此,要经常保持皮肤的清洁。
A.
空气中飘浮着的污物、尘埃、细菌
B.
角质层的老化
C.
自身皮脂腺分泌的油脂
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【单选题】某日，甲某乘坐司机乙某的出租车，匆忙中将价值8000元的手机遗忘在车内，稍后甲某记起，遂拨打自己的手机，乙某立即将电话挂断，后甲某根据车牌号找到乙某，乙某拒不交还手机。甲某报案后，公安机关将乙某抓获，则乙某的行为( )。
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