writing sample和research proposal 分别是什么?

writing sample和research proposal 分别是什么? COUNTER SAMPLE 和 PROTO SAMPLE ... estimation sample 和holdout sample 属于判别分析里的知识. 外贸中sample order和sample goods 如题 physical sample和producton sample是什么意思,有什么区别production eviews中 pairwise sample 和common sample有什么区别 specimen 和 sample的区别~如题, sample是什么意思买的cd上印有sample~他们和打口有什么区别~ 英语翻译Sample Input和Sample Output不用翻译，只要把题目写成汉语就行了 - - sample-sample-correlation是什么意思 sample invoice和proforma invoice 有什么区别 sample line和sampling line有什么区别 Writing to inform怎么写?Knowledge and Opinions还有Writing to inform和Writing to persuade 统计学中population和sample有什么区别?统计学中population和sample在概念上有什么区别? as English writing is very important in the new position.can you provide some sample first.it...as English writing is very important in the new position.can you provide some sample first.it can be proposal or any other business writing.这段英文 prototype和sample在外贸中的区别.我又看到有的地方把prototype sample连着一起用的. LED照明行业在A sample和B sample阶段分别需要做哪些测试在A sample和B sample阶段分别需要做哪些测试?我知道的是A-SAMPLE 性能测试（光学方面等）B-SAMPLE 功能测试,但具体是哪些性能和功能测试? sample是什么意思