鸡下蛋，蛋孵鸡，这周而复始的循环到底从哪里开始？科学家们提出了一种解释――鸡由鸟进化而来，鸟由恐龙进化而来，而恐龙从蛋里孵出来。那就是先有蛋喽？让我们一起来看个究竟吧。 Chicken or ...

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1、作主语1)、 直接位于句首做主语。例如：Swimming is a good sport in summer.例如：It is no use telling him not to worry.3)、动名词作主语与动词不定式作主语的比较：动词不定式和动名词...

语法 grammar句法 syntax词法 morphology结构 structure层次 rank句子 sentence从句 clause词组 phrase词类 part of speech单词 word实词 notional word虚词 structural word单纯词simple word...

推荐阅读：BEC商务英语初级经典句子积累汇总 1.There is no denying the fact that air pollution is an extremely serious problem :the city authorities should take strong measures to dea...

涉外商务英语合同的语言特色体现在以下几个方面： 第一部分、用词方面 多用正式或法律上的用词，与口头表述不同，合同是法律性的正式书面文件，使用正式的、法律的用词是必要的。合同起草者应多...

1. 特此奉告等 To inform one of; To say; To state; To communicate; To advise one of; To bring to one＇s notice (knowledge); To lay before one; To point out; To indicate; To mention;...

Directions: Write a composition entitled Generation Gap. You should write at least 120 words according to the outline given below in Chinese: 1. 现代生活越来越好，但老年人和年轻人...

Dear Mr. John, How are things going with you in Beijing? I am writing to show my thanks to you. You tutored me in my spoken English before you went to Beijing. With your help I mad...

带来2017年12月9日雅思写作真题大作文范文，社会类话题，题目是：A rise in the standard of living in a country seems to only benefit cities than rural areas. What problems might this d...