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my daily life 铜焊接产生的气体烟雾有毒吗?对人体有哪些危害? 如何磨练意志 磨练意志的计划一个计划 the investments are temporary and made from excess funds that you do not imediately need to conductoperation.until you need these funds,they are invested to earn a return.you should make these investments in sercurities that can be converted into cas 《我喜欢的老师》作文跪求! “我心与你同在”用英语怎么说以及有没有关于爱情的诗,最好是那种让人一看就感动的那一种. （世界与你同在）用英语怎么说? 机器人焊接气体流量有什么影响混合气体AR：CO2 9:1 到机器人时调整混合 现在表旁边的气柱被调成18:2了 是不是气流量就变成20L/MIN?有什么影响?具体的工艺评定没有做过 一般情况下机器人焊 焊接时,保护气体流量表容易结冰,请问是什么地方的问题,有什么解决方法 TIG焊接时保护气体流量范围 He----that right now.A.doesn't B.need doing C.needs to D.needn't to不好意思A选项打错了，应该是doesn't need do 气体流量对CO2保护焊熔深的影响?知道的请介绍一下 you should know that he______you money but your support A、needn't B、needs to C、doesn't need D、dyou should know that he______you money but your supportA、needn't B、needs to C、doesn't need D、doesn't need to要理由. it is a problem that doesn't need___right nowto solveso be solvingbeing solvedsolving 英语作文：my life in middle school （我现在还没上初中,要用将来时 will+v be going to+v be+v----ing he _____go to work at weekend a needn't to b doesn't need to c doesn't need d shouldn't to he _____go to work at weekend a needn't to b doesn't need to c doesn't need d shouldn't to 这道题是不是选C does‘nt need 关于need,情态动词和行为动词need的区别是什么,什么时候用needn't什么时候用doesn't need, you must wait for the green light .改为否定句 填空 You must wait_______the green light If you want to cross a street,you must____(wait)for the green light. You must wait for the green light 如何改不祈使句 直接 The force be with you 我不想有“愿...”的意思.我要表达原力已经与你同在,永远与你同在.语法上对吗,如果不对该怎么改. 《大笑江湖》中愿原力与你同在为什么给说成了别嚣张没什么用本山说的是英文,他那个跟班怎么给翻译成别嚣张没什么用.这两句有什么联系? 风焊怎么使用 愿上帝与你同在 一般这句话用在什么情况下是祝福语吗 二氧化碳是不是风焊? 焊接使用的气体 二氧化碳保护焊采用什么形式的局部排风比较好能不能说详细些 条件是这样的：在做汽车试制车间的焊接局部排风时,厂房有十四个焊位 对称布置 但开启率却不大 3个月只有50辆车 所以要求 what is the population of china同义句_____ ______is the number of people in china You can watch TV in yuor room(对划线提问）划的是watch TV What is the population of China 的同义句是什么?