useful什么意思

useful什么意思 useful什么意思 useful什么意思啊 Useful Sentences和Useful Sentences什么意思? C语言里有句int useful[line]={-1}什么意思? WHICH OF THESE DO YOUTHINK IS THESECONDMOST USEFUL INVENTION什么意思 circle the useful ones,and then match them with the word on the box什么意思 A strong mind needs astrong body in order to make it most useful什么意思 useful, useful be useful for=什么? a useful book的中文意思 it is very useful for you to practice writing if you find pen pals from foregin countries什么意思 have nothing in your houses that you do not know to be useful,or believe to be beautiful. 什么意思 The book is very useful.请问useful在句中修饰什么?、 是an useful book还是a useful book 加a 或者an 主要看什么 The computer is a useful machine的中文意思是什么? it is useful for our life啥意思,要中文