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GBT 19804-2005焊接结构的一般尺寸公差和结构公差? GBT 19804-2005焊接结构的一般尺寸公差和结构公差查看更多 3个回答 . 2人已关注
怎么的管道才能合乎我们的要求呢? < >我们的物料是一种浓浆,有腐蚀性,容易凝固,而且很容易粘管壁。现在想通过一个管道传输,不知怎样材质的管道才能合乎我们的这个要求?</P>查看更多 5个回答 . 3人已关注
虚拟语气练习及答案? 虚拟语气练习及答案16.10 虚拟语气练习 1.Everything ______ if Albert hadn’t called the fire brigade. a. will be destroyed b. will have been destroyed b. would be destroyed d. would have been destroyed 2.If you hadn’t gone with Tom to the party last night,______. a. you would meet John already b. you won’t have missed John c. you will have met John d. you would have met John 3.Supposing this ship ______ , do you think there would be enough life jackets for all the passengers? a. was sinking b. has sunk c. were to sink d. sunk 4.The insects would devour all our crops and kill our flocks and heads, if ______ for the protection we get from insect-eating animals. a. it is not b. it were not c. were it not d. they were not 5.The teacher suggested that each student ______ a plan for the vacation. a. made b. make c. makes d. will make 6.Frankly, I’d rather you ______ anything about it for the time being. a. do b. don’t do c. didn’t do d. will not do 7.After the way she treated you, if I ______ in your place. a. be b. am c. was d. were 8.The idea is that the nation ______ an unmanned spacecraft to explore the planet first. a. sent b. sends c. send d. must send 9.It’s high time you ______. a. start to work b. would start to work c. started to work d. had started to work 10.“If I hadn’t practiced when I was younger,” the musician says,“I ______ able to play so well now.” a. wouldn’t be b. won’t be c. wouldn’t have been d. couldn’t have been 11.It is imperative that you ______ there in person. a. are b. were c. be d. will be 12.The atomic structure is, ______, a miniature solar system. a. as it were b. as if they were c. as it were d. as if are 13.We required that the machine parts ______ cast iron. a. is made of b. be made from c. be made of d. is made by 14.The management urged that the cost of production ______. a. to be further reduced b. was further reduced b. be further reduced d. should further reduced 15.The business is risky. But ______ we would be rich. a. should we succeed b. we should succeed c. might we succeed d. would we succeed 16.I wish our teacher ______ to give another test. I haven’t got prepared yet. a. isn’t going b. weren’t going c. will not going d. could have gone 17.I wish I ______ to the movies with you last night. a. went b. did go c. could go d. could have gone 18.I’d just as soon ______ rudely to her. a. that you won’t speak b. your not speaking c. you not speak d. you didn’t speak 19.If I ______ in the twenty-first century, I ______ my vacation in a very different way. a. should live…would spend b. will live ….should spend c. are living … should have spent d. will be living…would have spent 20.It is required that the machine ______ as frequently as necessary. a. be oiled b. must be oiled c. is oiled d. will oil 21.His English teacher recommends that he ______ a regular degree program. a. begins b. begin c. will begin d. is beginning 22.We prefer that the plan ______ before being put into execution. a. is fully discussed b. must be fully discussed c. be fully discussed d. will be fully discussed 23.What do you think of his proposal that improvements ______ in the old type of vacuum cleaner? a. be made b. will be made c. would be made d. will have to be made 24.The doctor’s advice is that the patient ______ about his real physical condition. a. be not told b. not be told c. will not be told d. must not be told 25.______,we could not have finished the work on time. a. If they do not help us b. Was it not for their help c. Should they offer to help us d. But for their help 26.If we had been more careful, we ______ much better results now. a. got b. had got c. would be getting d. would have got 27.Henry ______ a rich man today if he had been more frugal in the past. a. would be b. is c. will be d. was 28.They thought it desirable that an armed guard ______ in readiness. a. stands b. stand c. stood d. would stand 29.All science students, ______,should have a good foundation in basic sciences. a. whether they are future physicists and chemists b . they are future physicists of chemists c. they should be future physicists of chemists d. be they future physicists or chemists 30.Sally can’t have written tome, or ______ the letter by now. a. I’ll get b. I’ll have got c. I’d have got d. I’d get 31.I should very much like to have gone to the party but I ______. a. am not invited b. was not invited c. shall not be invited d. am not being invited 32.There is a general understanding among the members of the Board of Directors that chief attention ______ to the undertaking that is expected to bring in highest profit. a. is given b. gives c. should be given d. must be given 33.One of the requirements for a fire is that the material ______ to its burning temperature. a. be heated b. is heated c. would be heated d. to heat 34.“Did you go to see the football match yesterday?” “No. I didn’t feel well, but I would have gone if I ______.” a. did b. have c. would d. had 35.If we had known that she had planned to arrive today, we ______ her at the bus station. a. may have met b. might meet c. may meet d. might have met 36.We’re safer in a train than we would be if we ______ any other way. a. traveled b. had traveled c. travel d. have traveled 37.He told me how he had given me shelter and protection without which I ______ of hunger and cold. a. would be died b. would have died c. would die d . will have died 38.______ today, he would get there by Friday. a. Was he leaving b. If he is leaving c. Were he to leave d. If he leaves 39.Had electronic computers not been invented, many problems of space flight ______. a. could be not solved b. could not be solved b. could not have been solved d. could not have solved 40.He is a poorly learnt man. But he acts as though he ______. a. is b. were c. should be d. seems like 41.The driver looked over the engine carefully lest it ______ on the way. a. goes wrong b. go wrong c. went wrong d. would go wrong 42.______ the fog, we should have reached our destination. a. Because of b. In spite of c. In case of d. But for 43.The old man went to office on foot, but he ______ by bus. a. might have gone b. ought have gone c. could have gone d. should be gone 44.He is working hard for fear that he ______ to pass the exam. a. fails b. may fail c. should fail d. would fail 45.She put on her glasses in order that she _____. a. can see b. saw c. had seen d. might see 46.Whatever ______ we’ll go ahead. a. had happened b. will happen c. might happen d. may be happened 47.If I ______ out of ink, I might have finished writing the paper. a. hadn’t run b. shouldn’t run c. didn’t run d. haven’t run 48.But for your advice, I ______ into trouble. a. would get b. got c. might have got d. should get 49.______ for the traffic jam, I should have covered fifty miles. a. Had it been b. Had it not been c. It had not been d. It not had been 50.Were it not for the adoption of the open policy, things ______ they are today. a. would never be b. could have been c. would never have been d. didn’t have 51.If only I ______ there. a. have not been b. would not been c. will not be d. had not been 52.Tom would buy that bicycle but he ______ no money. a. had b. has c. had had d. has had 53.I didn’t go to the party, but I do wish I _____ there. a. was b. were c. had been d. went 54.It is time we ______ up our results. a. sum b. summed c. will sum d. would sum 55.Dr Bethune worked hard as if he ______. a. never had felt tired b. had never felt tired c. never felt tired d . was tired never 56.I enjoyed the movie very much. I wish I ______ the book from which it was made. a. have read b. should have read c. am reading d. had read 57.It is strange that such a thing ______ in your school. a. will happen b. happens c. should happen d. happened 58.If she could sew,______. a. she make a dress b. she would have made a shirt c. she will make a shirt d. she would had made a coat 59. “Did you notice John was not at work today?” “No. If ______ working, I would have noticed it.” a. I’d be b. I wasn’t c. I’d been d. weren’t 60.“Why don’t you explain it to her?” “I ______ it to her if I thought she would understand.” a. would explain b. will explain c. explain d. would have explained 虚拟语气练习答案 1 D 19 A 37 B 55 B 2 D 20 A 38 C 56 D 3 C 21 B 39 C 57 C 4 B 22 C 40 B 58 B 5 B 23 B 41 B 59 C 6 C 24 A 42 D 60 A 7 D 25 D 43 C 8 C 26 C 44 C 9 C 27 A 45 D 10 A 28 B 46 C 11 C 29 D 47 A 12 C 30 C 48 C 13 C 31 B 49 B 14 C 32 C 50 C 15 A 33 A 51 D 16 B 34 D 52 B 17 D 35 D 53 C 18 D 36 A 54 B查看更多 0个回答 . 3人已关注
管底标高是以什么为基准面的? 请教前辈们: 我现在有两条管子,一个在室外EL+0.000,一根在室内EL+0.100,我怎么表示这两个管子的标高呢,是以那个为基准面呢?谢谢大家了查看更多 2个回答 . 4人已关注
煤炭产业低碳绿色发展:山西建成20多个煤炭循环园区? 本文由 盖德化工论坛转载自互联网 新华网太原9月17日报道“我们有一个强烈的愿望,那就是把黑色的 煤炭 还原成绿色的资源,把高碳的资源转变成低碳的财富。”正在此间举行的第五届(太原)国际能源产业博览会暨2014低碳发展高峰论坛上,山西省长李小鹏说。 对有“煤海”之称的山西而言,煤炭是重要的支柱产业,以2013年的数据为例,煤炭工业增加值3451亿元,占地区生产总值的27,4%,占工业增加值的54.9%,煤炭对财政收入的贡献率达到31%。 作为中国的重要能源基地,上世纪50年代以来,山西已经累计生产140多亿吨优质煤炭。 山西形成的以煤炭、焦炭、冶金、电力为主的产业结构,能耗水平和碳排放强度均高于全国平均水平。发展方式粗放导致煤炭生产和消费带来的资源浪费、生态破坏、环境污染问题十分突出,节能减排和保护生态的任务繁重而艰巨。 联合国环境署前主席劳伦斯·布鲁姆表示,中国成功地使6亿人脱贫,但也有对环境的连带损害,要考虑一种不同的经济增长模式,兼顾环境保护和改善。 意识到问题的山西,近年开始大力将绿色植物变成的黑色煤炭再“还原”成绿色资源。 2014年,山西省制定了国家创新驱动发展战略山西行动计划,山西省低碳创新行动计划,成立了低碳创新发展领导机构,组建了低碳发展专家咨询委员会,形成了全省上下共同推动低碳发展的组织体系。 同时,启动建设山西科技创新城,编制了煤电、煤层气、煤焦化、 煤化工 、煤机装备、煤基新材料和富碳农业等煤基低碳产业的创新链,提出了首批76个低碳重大科技项目。 目前,山西已累计投资640亿元建成20多个煤炭循环园区,从根本上改变了传统的“挖煤、烧煤”方式。“十二五”期间,山西循环经济项目总投资将达8600多亿元,可利用或减排大量矸石、 粉煤灰 、粉尘、二 氧化硫 等工业废弃物。 “国内外先进的煤炭清洁高效利用技术不断取得突破,煤层气抽采利用技术,煤炭液化、气化,燃煤超低排放等新技术的不断突破,为煤炭产业低碳绿色发展提供了技术支撑。”中科院煤化所副所长房倚天说。 “优化能源结构,提高清洁低碳能源比重,对煤炭进行部分替代,是未来能源发展的大势所趋。”李小鹏说。查看更多 1个回答 . 5人已关注
关于洗油馏程的一些知识? 以前我们化验洗油时 用230℃--300℃,可是现在请了一个师傅来后,她用的是270℃作为指标,还说230是旧指标,请问大家是这样吗?查看更多 12个回答 . 2人已关注
热管(换热器)在工业中有哪些应用? 热管作为新型高效 换热设备 ,已经在普通工业领域有所应用,现在工业(尤其化学工业)上有哪些在使用热管?请各位讨论,发表意见,最好有实例、图片等等。 查看更多 1个回答 . 4人已关注
各国还原炉比较? 大家来讨论一下,德国,美国,俄罗斯,国内的炉子,那个更好一些?从多方面说说吧,我提议查看更多 2个回答 . 1人已关注
长距离天然气管道的小问题? 请问各位,对于长距离 输油管 道,我们都知道水力坡降线和地形纵断面图不能有交点,那么对于输气管道而言,这两种线是否可以有交点?? 查看更多 0个回答 . 1人已关注
水环真空泵2BE1系列都有柔性阀板吗? 有,NASH的,都是模子冲出来的…… 学习了 查看更多 3个回答 . 4人已关注
UU-6催化裂化重油裂化助剂? 1. 产品性能特点 UU-6催化裂化重油 裂化助剂 ,又称催化裂化活性强化助剂,是北京惠尔三吉绿色化学科技有限公司最新研制的增加大分子裂化的催化裂化助剂。UU-6助剂是基于裂化反应的特点而设计,塔底油裂化助剂具有较高的B酸和L酸中心数之比,并含有适宜的弱B酸中心,以便控制好反应和吸附的关系,减少焦炭和干气的生成。此外,助剂的孔分布采用梯度分布,增加中孔比例,从而使油气大分子进入孔道在酸中心上进行反应,产物分子尽快地离开孔道,避免二次反应发生,减少焦炭前身物的聚合,从而减少生焦。UU-6助剂含有55%以上的具有超高活性及稳定性的UUY 分子筛 。 工业应用实践表明:添加10~15%的重油助剂可以减少油浆产率,提高高价值产品(液化气+汽油+柴油)产率1个百分点以上,而气体和焦炭产率基本不增加。重油助剂可减少 催化剂 单耗5-20%。 UU-6塔底油裂化助剂质量指标 项目 单位 要求 灼减 m% ≤ 10.0 Al 2 O 3 m% ≥ 40.0 Na 2 O m% ≤ 0.30 表观堆密度 g/ml 0.65~0.80 表面积 m 2 /g ≥ 270 磨损指数 m%/h ≤ 3.0 孔体积 ml/g ≥ 0.30 微活(800℃/4h) m% ≥ 80 筛分组成 0~40um % ≤ 20 0~149um % ≥ 90 2. 使用方法及用量 使用方法有两种,一是在新鲜催化剂加入催化剂储罐的过程中,按比例直接掺混;二是用小型加料器根据需要单独加入到催化裂化装置中。 UU-6的加入量一般占系统催化剂总藏量的10~20%。为快速取得良好效果,一般采用“先快速加入,然后平稳加入”的方法。快速加入是:第一次使用时,在2-3周内,使助剂提高到占系统藏量的10%以上。平稳加入是:按新鲜剂中助剂比例约15%的水平,将助剂混兑到新鲜剂中,按正常补剂平稳加入;或新鲜剂中不混兑助剂,助剂全部从助燃剂加料系统按比例加入。 3. 储存包装 (1)本产品按一般无机化工品储运,贮存于干燥处,防潮防雨。保质期5年;运输过程中应防止破损。 (2)标准包装:25公斤或30公斤塑胶袋包装,内衬防潮膜;特殊包装:可根据用户要求采用其它包装。 查看更多 0个回答 . 3人已关注
能不能用气液平衡参数来代替缺少的液液平衡参数? 假如我想做一个四元体系的液液平衡模拟,aspen数据库中,部分组分间有LLE-ASPENE二元交互作用参数,其它的只有VLE参数,请问VLE参数可以当LLE参数来用吗?(或者这问,缺少的LLE-ASPENE参数用VLE参数来代替好,还是用估算出来的参数好?查看更多 9个回答 . 3人已关注
郁闷!大家来看看这种情况安全部门该怎么办?!? 今天,我们新建的大型化工单位要对电气的保护定值进行规定,由于设计院不给我们出东西,领导要求电气、安环、机动、生产和设备的副总、安全副总、总经理一起对某个协作单位计算的结果进行签字,共同承担责任。 安全副总随即提出了异议,我当时也提出异议,我们安全部门对技术把关签字,我觉得不是安环部门的职责,再说,安全保护定值是什么我们也不知道,况且还没交工,责任还没转移啊。老总非常生气的说,你们两个可以走了! 一个副总说,你们安全部门干啥?光监督别人,什么责任都不担吗?! 我说,假如为了生产保证连续运行,现在要拆掉一个 安全阀 ,生产上要安全部门签字,同意拆除,安全附件拆除是安全部门应该阻止的事情,你说这时候安全部门该怎么办?副总直接说,你不签不就是让停车吗?要你们安全部门管啥?该承担责任的时候要承担责任。 我真的无语了,只好在结果上签字。 我真的不知道下一步该怎么办? 大家帮我出出主意,下一步该怎么办啊? 查看更多 13个回答 . 4人已关注
我是刚毕业的学化学工程的本科生进的新化工厂想找本学习 ...? 我是刚毕业的学化学工程的本科生进的新化工厂想找本学习DCS系统的书 哪位大哥介绍下哪儿可以找到?查看更多 13个回答 . 4人已关注
福建永春县全面开展煤矿“打非治违”专项行动? 日前,福建永春县在全县所有煤矿全面部署开展“打非治违”专项行动,集中时间,集中力量,强化各煤矿企业安全生产责任落实,强化监管执法,严厉打击非法违法和治理纠正违规违章行为。 此次专项行动重点内容:一是按照“七条规定”的有关要求,对照内容逐条进行排查,对违反“七条规定”的,坚决予以停产整改。二是严厉打击无证非法超层越界、私拆密闭、边建设边生产、图实不符等行为。三是对水害威胁严重煤矿企业及矿井,未建立健全防治水制度或防治水机构人员配备不符合要求的;水文地质基础资料不完整、周边采空区边界不清楚的;探放水制度、防治水措施及水害应急救援措施不落实的。此次整治工作分部署动员、集中整治和总结提高三个阶段进行。各煤矿企业要结合实际,研究制定整治工作实施方案,细化明确整治工作重点内容、职责分工等具体要求。要认真按照“七条规定”要求,对照《煤矿安全规程》及相关规定,全面排查存在的问题,制定整改计划及措施,落实整改资金、时限、责任人和预案,及时消除隐患。煤管局将集中力量分组开展集中整治,全力打击违反“七条规定”、安全生产非法违法和治理违规违章生产经营建设等行为。查看更多 0个回答 . 1人已关注
在化肥厂的朋友们,你们如何转型的,可以讨论讨论吗? 在化肥厂的朋友们,你们如何转型的,可以讨论讨论吗? 查看更多 1个回答 . 4人已关注
如何评价安全检查的质量? 现在各个公司临近节假日都进行领导带队的检查,结果只有一个领导在夸夸其谈,结果一个检查下来,说的都是与安全检查无关的内容,如何做一个有质量的安全检查呢?查看更多 3个回答 . 3人已关注
制氢鼓风机? 可以考虑加一个伴热盘管解决一下。温度高了,冰就不容易解了。查看更多 7个回答 . 4人已关注
应力和应变的伴生关系如何? 近日看到一题,如下: 杆件受拉伸时,其横向产生应力吗? 各人认为:产生。依据材料力学泊松比的定义,杆件受拉伸时,横截面面积变小,横向产生应变;而有应变一定有应力,所以杆件在横向产生压缩应力。 有应变一定有应力是个人看法,没有确切的依据,不知道各位还有怎么看?望解答(要有确切依据) 查看更多 1个回答 . 1人已关注
催化裂化再生器主风分布管有哪几种结构形式? 催化裂化再生器主风分布管有哪几种结构形式?哪一种使用效果较好?炼油的盖德可以谈谈各自装置运用的主风分布管情况.查看更多 11个回答 . 2人已关注
简介
职业:济南惠成达科技有限公司 - 库房管理员
学校:湖北大学 - 化学化工学院
地区:甘肃省
个人简介:无聊的时候,只能发说说刷存在感。查看更多
已连续签到天,累积获取个能量值
  • 第1天
  • 第2天
  • 第3天
  • 第4天
  • 第5天
  • 第6天
  • 第7天
 
这是一条消息提示
 
提醒
您好,您当前被封禁天,这天内您将不能登陆盖德问答,离解封时间还有
我已了解
提醒
提问需要5个能量值,您当前能量值为,请完成任务提升能量值
去查看任务