单项选择题
在测定食品中挥发性酸的过程中,加入少许磷酸的作用为( )。
A、加速反应
B、去除食品中还原糖
C、使结合态挥发性酸解离
D、排除样品中的CO2和SO2
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The underlined word 'parochialism' in the third paragraph can best be replaced by ______ .A.open-mindednessB.provincialismC.colonialismD.optimism
A.A.open-mindedness
B.provincialism
C.colonialism
D.optimism
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未分类题
______ I like very much to do science, as a teacher 1 have to go over the students' papers and thesis.A.Much asB.So farC.In so far asD.As far as
A.A.Much
B.So
C.In
D.As
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