问个关于英语词组的问题

the number of
是说某样东西的数量，后面的be动词用单数形式，比如：The number of Panda is getting smaller and smaller.

a number of=a lot of，
指某样东西的数量多，后面的be动词用复数形式，比如：a number of students are studying here.

请采纳！！

http://www.google.cn/search?client=aff-cs-maxthon&forid=1&ie=utf-8&oe=UTF-8&hl=zh-CN&q=the+number+of%2Ca+number+of%E5%9C%A8%E7%94%A8%E6%B3%95%E4%B8%8E%E5%90%AB%E4%B9%89%E4%B8%8A%E7%9A%84%E5%8C%BA%E5%88%AB

http://www.google.cn/search?client=aff-cs-maxthon&forid=1&ie=utf-8&oe=UTF-8&hl=zh-CN&q=the+number+of%2Ca+number+of%E5%9C%A8%E7%94%A8%E6%B3%95%E4%B8%8E%E5%90%AB%E4%B9%89%E4%B8%8A%E7%9A%84%E5%8C%BA%E5%88%AB！！！！！！！！！！！！！！