词组the/a number of用法相关求助关键在于the number of 后面什么时候再加一个 the 而什么时候不加~在网上看到的句子:①The number of candles is the person's age.②The number of the students in our class is 50.上面两个句子中①是 the number of ...②是 the number of the.两者有什么区别吗?另外请高手们再说一下a number of 的用法~

词组the/a number of用法相关求助
关键在于the number of 后面什么时候再加一个 the 而什么时候不加~
在网上看到的句子:①The number of candles is the person's age.
②The number of the students in our class is 50.
上面两个句子中①是 the number of ...②是 the number of the.
两者有什么区别吗?
另外请高手们再说一下a number of 的用法~