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【多选题】
重要会务接待需要注意A.
饮料准备需一冷一热，一瓶一杯。
B.
有外籍客人还要考虑有中有外
C.
以饮料招待客人征询的标准方式应为封闭式问题，而非开放式问题。
D.
上饮料的规范顺序应该是先宾后主，先尊后卑。
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【单选题】Without the air to hold some of the sun's heat, the earth at night _______, too cold for us to live. [ ]
A.
will be freezing cold
B.
would be frozen cold
C.
can freeze coldly
D.
would be freezing cold
【单选题】Without the air to hold some of the sun’s heat, the earth at night_____very cold, too cold for us to live.
A.
will be
B.
would have been
C.
is
D.
would be
【单选题】Without the air to hold some of the sun's heat, the earth at night _____,too cold for us to live. [ ]
A.
would be freezing cold
B.
will be freezing cold
C.
would be frozen cold
D.
can freeze coldly
【单选题】The medicine has many functions, ______ are unknown to us.
A.
some of which
B.
of which some of them
C.
that some of them
D.
which of them
【单选题】Without the air to hold some of the sun’s heat,the earth at night ________,too cold for us to live. [ ]
A.
would be freezing cold
B.
will be freezing coldly
C.
would be frozen cold
D.
can freeze coldly
【简答题】漂流因数可表示为 __________ ,它反映了 ___________________________________ 。
【多选题】关于中国宪法渊源的表述,下列哪些选项是正确的?( )
A.
宪法典是中国宪法的主要渊源
B.
宪法性法律不是中国宪法的渊源
C.
国际条约属于中国宪法的渊源
D.
全国人大常委会对《中华人民共和国宪法》的解释属于中国宪法的渊源
【简答题】单向扩散中飘流因子 。漂流因数可表示为 ，它反映 。在相同的温度、压力和混合物组成条件下，等分子反向扩散速率 单相扩散速率（一组分通过静止气膜的扩散速率）。其原因是____________。
【简答题】漂流因数可表为 __________ ,它反映 __________ 。
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