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Howmanyof.与howmany.的区别HowmanyofthesubjectsaresciencesubjectsHowmanysubjectsaresciencesubjects?其中为什么一句要用Howmanyof,而另一句不用?

题目详情
How many of.与how many.的区别
How many of the subjects are science subjects
How many subjects are science subjects?
其中为什么一句要用How many of,而另一句不用?
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答案和解析
How many of the subjects are science subjects
这些科目中理科的科目,有多少?
of the+名词,限定了名词的范围,一般是前面提到的.
How many subjects are science subjects?
理科的科目,有多少?
没有限定,只要是科目就行,问“一共”有多少理科的科目.