不定冠词'a'的提问One way to understand thousands of new words is to gain _______ good knowledge of basic word formation.A./ B.the C.a D.oneknowledge是不可数名词 那请为什么答案是C 而不是A

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不定冠词'a'的提问One way to understand thousands of new words is to gain _______ good knowledge of basic word formation.A./ B.the C.a D.oneknowledge是不可数名词 那请为什么答案是C 而不是A

不定冠词'a'的提问One way to understand thousands of new words is to gain _______ good knowledge of basic word formation.A./ B.the C.a D.oneknowledge是不可数名词 那请为什么答案是C 而不是A
不定冠词'a'的提问
One way to understand thousands of new words is to gain _______ good knowledge of basic word formation.
A./ B.the C.a D.one
knowledge是不可数名词 那请为什么答案是C 而不是A

不定冠词'a'的提问One way to understand thousands of new words is to gain _______ good knowledge of basic word formation.A./ B.the C.a D.oneknowledge是不可数名词 那请为什么答案是C 而不是A
讲知识的总称的时候就不可数,如:He is a person with much knowledge.讲具体的某个种类的知识时就可数,如本题,和上面的那个例子(I have a knowledge of maths) .
这样的词在英语中很多的,如,fish,fruit等

好象是固定搭配
e.g I have a knowledge of maths

抽象名词有这样一种用法
如果前面有形容词修饰的话,相应前面就用a,表示某种具体性质
结构是a+adj.+抽象n.+of 类似的还有importance等等