皮皮学，免费搜题
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【多选题】
擦脸总的要求要做到( )A.
熟练高效
B.
面巾与皮肤伏贴
C.
力度适当
D.
干净均匀
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皮皮学刷刷变学霸
举一反三
【单选题】Profit per unit is rising when marginal profit is:
A.
greater than average profit per unit.
B.
less than average profit per unit.
C.
equal to average profit per unit.
D.
positive.
【单选题】When detaining a person, a public security organ must produce a detention ________.
A.
warrant
B.
certificate
C.
proof
D.
document
【简答题】n.(墙上的)搁板,架子
【单选题】Fields found that when the bacteria accounted for 100 parts per million of the grain, the beetles' supercooling point ______.
A.
rose by 4℃
B.
dropped by 4℃
C.
rose by 5℃
D.
dropped by 5℃
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