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【多选题】
下列有关消防管道工程常用连接方式的说法，正确的有（ ）。A.
采用螺纹连接时，热浸镀锌钢管的管件宜采用锻制承插焊和螺纹管件
B.
宜采用密封胶带作为螺纹接口的密封，密封带螺纹上施加
C.
法兰连接是管道工程中最重要且应用最广泛的连接方式
D.
法兰连接按法兰与管子的固定方式分为螺纹法兰、焊接法兰、松套法兰等
E.
消防上多用到铸铁管的承插连接，铸铁管的承插连接方式分为机械式接口和非机械式接口
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举一反三
【单选题】—What made you so angry?—______.
A.
Tom having been late again
B.
Tom to be late again
C.
Tom' s being late again
D.
Tom was late again
【单选题】Uncle Tom ________ an interesting story for the children.
A.
made from
B.
made out
C.
made up
D.
made of
【单选题】___taken away made his parents worried and they had to turn to the police for help.
A.
Tom’s
B.
Tom being
C.
Tom
D.
Tom’s being
【单选题】Tom ' s brother _____ me _____ Tom just now.
A.
make , to help
B.
make , help
C.
made , help
D.
made, to help.
【简答题】分离单糖苷、双糖苷、三糖苷采取哪种色谱法,洗脱顺序如何?
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