141.3管线容积怎么算

if there had not been a hard layer of rock beneath the soil,they would have completed the job in a hours.这句话我有2处不懂.1.if there had not been这里的had是作“有”的意思吗 had not 是否定形式“没有”的意思?如果这 learn from scientific If there had not been a hard layer of rock beneath the soil 这句话为什么要用过去完成时呢?they would have completed the job in a few hours. 和nelly furtado唱say it right的那个男的是谁?有点难.我觉得是flo rida 源于设计（From Design） TASTEFUL space is for human to designer design is a kind of life come from life and imtegrate toimtegrate to life 不是imtegrate,是integrate 广东话聊天怎么说 Everything stars from scratch是什么意思? everything is starting from scratch.的中文意思 Lost my heart,Everything starts from scratch. Linux from Scratch像我这样对linux没多么概念的新手,想成功做一次lfs需要多长时间 英语翻译Everything starts from scratch,and a skyscraper is built on its foundation.Similarly,Rainwood has grown into inclusion of a dozen of elite consultants from only several ones at its beginning.We started from desperately searching customers A person has no time _____(剩下)for going over what he has read填空、. The landscape design as the same treatment as my second life. using this method a person probably has no time left fo going over what he has read,using this method 在句中做什么用? You My Wilf But you My 就是(聊天)用粤语怎样说 广东话 少说话 怎么说 求翻译:She retorted an argument against me. He_____(run)well.He is a good runner.（用括号内所给的动词的适当形式填空） 英文对话读不懂在学校勉强过了6级,但至今读不懂地道的英文对白,买了本《美轮美奂的英文舞台剧》,里面很多句子单词都没问题但就是觉得费解!也不能说完全不懂但是和原意差了很多!比如 grandma hasn't taken her medicine yet.Maybe she forgeot.(为什么?)grandma hasn't taken her medicine yet.Maybe she forgeot.为什么用hasn't,而不是hadn't?还有,为什么是forgot? she hasn't taken her medicine yet?改为肯定句时,yet去掉吗? 帮我看看这是介绍什么时态,现在完成时还是现在完成进行时（1）现在完成时用来表示对目前状况仍有影响的,刚刚完成的动作（常与yet,already,just连用）,或者过去某一时刻发生的,持续到现在 丁晨是女的,适合的英文名 请问ISO9001里的一个叫：PDCA的英文全些是什么? 用“共看明月应垂泪,一夜乡心五处同.”写一段完整的话写一段完整的话,其中运用“共看明月应垂泪,一夜乡心五处同” 《望月有感》辞根散做九州蓬的读音 共看明月应垂泪,一夜乡心五处同的读音,不是拼音,要有音调的. The island ___ he lived in his childhood is far from the town.A which B in which C on which D that 我不会英语.Peter and I live in the same building．His room is on the tenth floor,but mine is on the ninth floor．He is kind but careless,and sometimes gets into trouble． 　　Last Friday afternoon,the young man went to a wild island to spen 我不会英语啊 求我不会英语