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【多选题】
吃西餐时餐巾使用礼仪正确的是( )
A.
餐巾可用于擦脸、擦汗
B.
铺在腿上,膝盖以上的双腿部分
C.
也可系在腰间或压在盘子下
D.
中途离放在座位上
E.
吃完饭后将餐巾叠整齐
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A.
opening
B.
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A.
地接社,地接社承担责任后可以向公共交通经营者追偿
B.
组团社,组团社承担责任后可以向地接社追偿
C.
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B.
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A.
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【单选题】有一溶液,遵守 Lambert-Beer 定律,在 280nm 处,当浓度为 c 时,测得吸收度为 A, 当其浓度分别为下列几种情况时,透光率最大的浓度是( )。
A.
0.5c
B.
1.5c
C.
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D.
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【单选题】有一溶液,遵守 Lambert-Beer 定律,在 280nm 处,当浓度为 c 时,测得吸光度为 A,当其浓度分别为下列几种情况时,透光率最大的浓度是
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A.
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B.
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C.
the editors clearly favoured benefactors
D.
the editors were irrational in their choices
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