石油和煤炭怎么形成的

为什么(┐p∨┐q∨┐r∨s∨r)∧(┐p∨┐q∨r∨s∨┐s)是T? 求p→(q→r)的主合取式 the bird its wing and flew away.A spread B expanded C extended D scattered C bird the and became away angry flew怎么连 how are you getting on with everything?Things are getting quite well 何意? 英语翻译 how to get on well with people around you求一篇英文演讲稿3分钟以上就行了内容不限要求质量高点的～ bird,the,and,beacame,away,angry,flew排列成一个完整句子. 英语学霸快来～ 英语学霸快出现! go there right away改为否定句　don't walk on the right side .改为肯定句let’s hurry.改为否定句 WALKING ON THE WILD SIDE怎么样 数理逻辑((p∧┐q)∨(q∧r))∨r∨p如何计算?((p∧┐q)∨(q∧r))∨r∨p 这个怎么算 教科书上说用两次吸收律 She____(put)the apples into the box carefully and took the box away.我填的是putted,但答案上是put.为什么? The cat beside the box is Kate's.beside the box为划线部分【对划线部分提问】 英语学霸来吧~~Part 2. Fill in the blanks with the proper preposition. 1. She waited half an hour ___in_____ the corner ___of_____ the street.2. I’ll have a meeting _____at___ 2:30 _____in___ Thursday.3. She waited half an hour ___in_____ the 来吧,英语 知心园用英语怎么说?不好意思。我说的知心园是一个小区的名字。 英语翻译英语辅导报上的 英语学霸快来啊! 用with sb +形,造两个句子 ________you_______(have)a ping-pong ball? We must not across the road.这句话哪里错了?快 英语的两个语法辨别问题我知道过去分词形式可以做定语,动名词形式也可以,但不知道二者怎么区别,都应该在什么时候用?masses of , the number of, many of,a large number of 有什么区别?这四个短语的后 these books each 用什么样的动词形式 These books will be______ helpful to those who wish to improve their English.A specilly B praticularly Word comes____free books will be given to ____come first in this book fair. 为什么填that, those who ? word comes是什么意思?为什么可以这样用? word comes ——free books will be given to ——come first this book fair.A that ,anyone who Bthat ,those who为什么选B these books will be______(give)away to the poor children in the mountain villagepeople don't need_________(spend) too much money. It is very awful to walk in wet and dirty streets.(对划线部分提问,划very awful) it is(very awful) to walk in wet and dirty streets划线提问 Forever Love Have Been Lasting~有语法错误吗