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【单选题】
.H2PO4–的共轭碱是( )。A.
HPO₄²–
B.
PO₄³–
C.
H₃PO₄
D.
OH-
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【单选题】1)Who is the first scientist discovered that yeast extracts could ferment sugar to alcohol?
A.
James Watson
B.
Francis Crick
C.
Christian Anfinsen
D.
Eduard Buchner
【单选题】在工程开工前,总监理工程师应组织专业监理工程师审查承包单位报送的施工组织设计(方案)报审表,提出意见,并经总监理工程师审核、签认后报( )。
A.
设计单位
B.
监理单位
C.
建设单位
D.
施工单位
【单选题】Two and a haft centuries on, most countries impose some sort of tax on alcohol and tobacco. With surging obesity levels putting increasing strain on public health systems, governments around the world...
A.
They are under growing pressure to balance their national budgets.
B.
They find it ever harder to cope with sugar-induced health problems.
C.
The practice of taxing alcohol and tobacco has proved both popular and profitable.
D.
The sugar industry is overtaking alcohol and tobacco business in generating profits.
【单选题】"Sugar, alcohol and tobacco," economist Adam Smith once wrote," are commodities which are nowhere necessaries of life, which have become objects of almost universal consumption, and which are, therefo...
A.
They were profitable to manufacture.
B.
They were in ever-increasing demand.
C.
They were subject to taxation almost everywhere.
D.
They were no longer considered necessities of life.
【简答题】万能铣床在主轴上刀或换刀时,为避免发生事故,主轴应处于停转并( )状态,因此,主轴电动机设有( )环节
【简答题】Sugar is added to the wine during ____to increase the alcohol level.
【判断题】Alcohol can cause low blood sugar, depending on how much you drink and you eat at the same time.
A.
正确
B.
错误
【单选题】What did Adam Smith say about sugar, alcohol and tobacco?
A.
A They were profitable to manufacture.
B.
B They were subject to taxation almost everywhere.
C.
C They were no longer considered necessities of life.
D.
D They were in ever-increasing demand.
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