英文：what is the difference between primary sources and second请用英文回答,是历史题,在美国,老师要 主要来源和次要来源之间的区别是什么

what is the matter的英文解释 what is the dominating poles?英文的 What is the origin of the badminton?需要英文资料, 英文What the hell is that是不是脏话?如题... What is importance of the Spring Festival?用英文答. 用英文回答what is the cause of water pollution? What is the capital of America.用英文怎么答 what shap is the national flag?回答最好用英文! what is the best and cheapest light?翻译成英文 这句英文甚意思?What is the Matrix? what is the Prime Meridian?用英文回答下谢谢 What is the rain forest?要英文和解释. What is the non-translation phenomenon?麻烦用英文回答 what is the sccessful job?(用英文回答, what is prose?what is the difference between prose and poetry?回答要英文版的~ 求英文话题作文~What is the important of China relations?What is the important of China relations? 英文句子纠错 what is the drum like?what is the drum like?句意：这鼓象什么 在word英文字体对不齐,怎么办啊Communication theory said that society people often based on their ownInterests,needs,and a wide range of social experience and cultural factors such as electionOptional use of the mass media.Individual diffe