风尘两清让步--盖德问答-化工人互助问答社区

风尘两清让步

影响力0.00

经验值0.00

粉丝8

给排水工程师

关注已关注 私信

他的提问 2369 他的回答 13702

PID 上的 BIRD SCREEN是指什么? 是做什么用途的呢？安装在室外还。查看更多 11个回答 . 2人已关注

关注问题已关注 回答

登录后参与回答

柴油发动机驱动消防泵开车问题？公用工程消防设施一般都有应急消防泵，一般都是柴油发动机驱动的。今天我们这儿也单机试车了，厂家有人。他只把电路检查，仪表控制整好。加了润滑油及燃料油。就说可以开了。最后的结果。根本不理想，有一台运行中振动过大，摁停了。我都纳闷：一个放置了大半年的东东，就不检查一些项目，就可以开？这内燃机和别的动设备有这么大的区别吗？查看更多 1个回答 . 2人已关注

关注问题已关注 回答

登录后参与回答

小弟求教一物化题目? 一定量的理想气体，节流膨胀过程的△U,△S,△G三者的变化？答案是△U=0,△S>0,△G<0 不是很懂，向大侠求教！谢谢查看更多 7个回答 . 1人已关注

关注问题已关注 回答

登录后参与回答

硫回收中加氢催化剂是什么成分？ 我们公司采用的是用钴钼加氢催化剂。查看更多 7个回答 . 1人已关注

关注问题已关注 回答

登录后参与回答

温故知新（系列21）？ 简答题：影响合成塔平稳操作的因素有哪些？查看更多 0个回答 . 2人已关注

关注问题已关注 回答

登录后参与回答

强烈要求再将贴出来？ 有些人太不讲道德了,好东东自己下了就删,楼主的辛勤劳动白费了,只好再请他贴出来了查看更多 4个回答 . 1人已关注

关注问题已关注 回答

登录后参与回答

空分装置试压？ 空分装置在安装完毕，进行试压时，冷箱外的部分是否有必要进行单独试压？还是在起车时同时进行试压查漏。各位一般是怎么做的？查看更多 7个回答 . 2人已关注

关注问题已关注 回答

登录后参与回答

求助：离心泵开机没流量的原因。？ 一台离心泵，客户安装后开机无流量，换其他泵头又有流量。麻烦帮我分析下可能出现这种情况的原因。查看更多 21个回答 . 2人已关注

关注问题已关注 回答

登录后参与回答

50万吨甲醇耐硫变换和低温甲醇洗的费用？年产50万吨甲醇的项目，得到某工程公司的费用估算：耐硫变换：设备费5000万。低温甲醇洗：设备费1亿3000万。硫回收：设备费2100万（包括尾气处理）。请问各位专家，这些估算还不离谱吧？查看更多 2个回答 . 2人已关注

关注问题已关注 回答

登录后参与回答

谁能帮我解释一下DBF30E，14.2↓/1600-1444什么意思? 谁能帮我解释一下DBF30E，14.2↓/1600-1444什么意思？查看更多 0个回答 . 3人已关注

关注问题已关注 回答

登录后参与回答

关于高温高压反应釜的问题？ 那位盖德知道国内高温高压反应釜做的比较好的企业名单，麻烦上传一下，谢谢！查看更多 4个回答 . 5人已关注

关注问题已关注 回答

登录后参与回答

丙类仓库事宜请教？请教大家， 1.丙类仓库可以放置酸、碱化学品吗？ 2.丙类仓库可以放置毒害品吗？ 3.丙类仓库可以放置少量易燃液体吗（面积不超过5%）？谢谢。查看更多 4个回答 . 1人已关注

关注问题已关注 回答

登录后参与回答

高塔复合肥养分波动分析？高塔复合肥养分波动分析，归纳起来有以下几点： 1.原料质量引起的复合肥成品养分波动 2.进入混合槽前系统引起的误差导致成品养分的波动 3.造粒引起成品养分的波动 4.颗粒结疤引起成品养分的波动 5.造粒温度引起成品养分的波动 6.配方测算引起成品养分的波动 7.冷却方式引起成品养分的波动 8.包膜剂使用引起成品养分的波动 9.堆积及储存方法引起成品养分的波动 10.细粉及大块肥回收方式引起成品养分的波动 11.系统各种除尘器引起成品养分的波动 12.造粒后系统引起的误差，对成品养分的波动查看更多 3个回答 . 5人已关注

关注问题已关注 回答

登录后参与回答

硫磺装置尾气加氢运行后外排烟气情况？硫磺装置的尾气经加氢处理，进焚烧炉燃烧后外排烟气二氧化硫含量多少？我们这目前是0.1--0.5%，还在调整中，国家规定按400执行吗？大家都炼厂是怎么做的？有没有更好的技术来降低烟气中的二氧化硫，看到资料中说美国能降到130mg/nm3,请教一下高手，有了解到吗？查看更多 2个回答 . 2人已关注

关注问题已关注 回答

登录后参与回答

CADWorx2018安装问题？这两天在安装CADWorx2018，Win10教育版，ACAD2018中文版。安装、和谐都很顺利，但就是不能运行CADWorx2018。界面一直显示在加载中。哪位有解决方案，请讲解！查看更多 12个回答 . 1人已关注

关注问题已关注 回答

登录后参与回答

减压塔真空系统，用哪种方式好，更稳定? 抽真空系统，用哪种方式好，水环+罗茨。还是利用大气喷射器，蒸汽喷射器？哪种利于减压塔的稳定操作？查看更多 15个回答 . 1人已关注

关注问题已关注 回答

登录后参与回答

气动阀的气开气关问题? 气动阀的问题，现场有一个气开的气动球阀，盘根压盖处漏液，由于紧固太紧，手动开关时阀门卡到一半，稍微松动一些紧固螺丝后，中控控制启动阀开关发现，气动阀中控开现场变为关闭，中控关闭，现场打开，将气动阀断气，启动阀为开启状态，这个气动阀由气开阀变成了气开阀，这是怎么回事？怎样在调整过来？急！谢谢，气动阀的电路没有问题，查看更多 15个回答 . 3人已关注

关注问题已关注 回答

登录后参与回答

请教一个反应机理的问题？ < >小弟接触有机时间比较短，最近老板交代了一个反应，基本情况如下。（由于没有chem绘图软件，没有分子式。） < >反应物：3，3-二甲氧基- 2-丙烯腈 +（盐酸羟胺 +氢氧化钠） < >反应产物： 3-氨基-5 -甲氧基-异口恶唑 < >反应一段时间后原料点是消失了，我用乙酸乙酯去萃取却得不到东西。我想反应可能是停在了中间的某个状态，比如说肟钠而没有关环。 我已将反应式上传了,请各位前辈帮我看看.. [此贴子已经被作者于2008-6-5 9:13:19编辑过] 查看更多 12个回答 . 5人已关注

关注问题已关注 回答

登录后参与回答

电机软启动器在空压机改造中的应用？电机软启动器在空压机改造中的应用异步电动机的启动是人们比较熟悉和关注的问题，从原理上讲只有两种方式：直接起动和降压起动。直接起动转矩大，对电网冲击影响大，只能在中小型电动机的启动上得到应用。在不允许直接起动的情况下，就需要采用降压启动方式，降压启动一般有星／三角启动、自耦变压器降压启动及文中推荐的软启动器启动方法。一、软启动简述软启动器是一种集电机软启动、软停车、轻载节能和多种保护功能于一体的新型电机控制装置，用软启动器启动电机时，输出电压逐渐增加，电动机逐渐加速，直至电动机工作在额定电压的机械特性上。 1. 软启动和一般降压启动的区别在电动机启动时，降低加到电动机定子绕组的电压，可以减小电动机的启动电流。一般降压启动是指电动机在启动过程中加在电动机定子绕组的电压变化是瞬间突变的；而软启动是使用调压装置在规定的启动时间内，自动地将启动电压连续、平滑地上升直到达到额定电压。异步电动机的机械特性可用n=f（M）来表示，其特性曲线如（图1）所示。从图中可看出，若采用一般降压启动，假设启动电压U=0.5Ue,则电动机启动时的转矩为0.25Mn，即启动时的转矩只有电动机最大转矩的1/4。如果在此时将电压U加大到电动机额定电压Ue，则电动机的转矩一下子就从1/ 4 跳到Mn，这样的启动过程是跳跃的、不平滑的，对生产工艺要求平稳启动的场合不宜采用。而软启动从初始电压开始电压连续平稳地增大。从图1中0.5Ue 的那根曲线连续平滑的不断向右平行移动，一直平稳到与额定电压Ue那根曲线重合时为止，那么电动机的转矩就会平滑地增大一直到转矩为最大值Mn时为止，启动过程也就结束。这样，启动过程中电动机的转矩是平滑的而不是跳跃的，启动过程是平稳的。 2、启动方式对电网的影响比较异步电机的各种启动方式，如（图2）所示，可以看出当电机全压启动时，对电网的冲击最大，冲击时间也最长，而通常使用的降压启动对电网的冲击虽比较小，但是由于涉及到一个线圈电压切换过程，所以出现二次冲击的不利环节，软启动由于在启动前设定了一个不对电网产生影响的启动电流，电流是缓慢增大至设定电流，故无冲击电流，对电网的影响最小，并且能消除启动力矩的冲击。二、电机软启动器在空压机改造中的应用通过软启动和其他启动方式的理论分析和比较，说明软启动可以在大型三相鼠笼式交流异步电动机的启动上得以应用，故用电机软启动器对一老式空压机进行改造，以适合现场需要。 1.空压机改造前状况空压机电机功率：200 kW，改造前采用自耦变压器降压启动方式，由时间继电器实现电机电压的切换控制，启动不稳定，故障率较高。主接触器采用CJ10型交流接触器，触点经常烧坏，且对电网影响严重，考虑采用软启动器实现电机的平稳启动和运行。 2.软启动器和其他元件的选型根据空压机的实际情况，选择了ABB公司生产的PST250-600-70型软启动器，此软启动器是基于最新的微处理器技术设计出来的，用于实现鼠笼式的软启动和软停止。它还附带了几种先进的电机保护功能，具有多种集成的保护和报警功能，几乎可以检测到所有故障，并将其显示出来。根据需要，我们还对熔断器、旁路接触器和热保护进行了选型。 3.软启动器的接线和控制软启动主电路接线如图2 所示当电机启动时，由电子电路控制晶闸管的导通角使电机的端电压以设定的速度逐渐升高，一直升到全电压，使电机实现无冲击启动到控制电动机软启动的过程。当电动机启动完成并达到额定电压时，使三相旁路接触器闭合，电动机直接投入电网运行。空压机启动时是空载，则在正常运行时，保持了所需的较低端电压，使电机的功率因数升高，效率增大。在电机停机时，也通过控制晶闸管的导通角，使电机端电压慢慢降低至0 ，从而实现软停机。 4 调整与试车软启动控制柜安装完成后认真检查，按设计图纸核对接线是否正确。晶闸管等电子器件不允许做绝缘电阻测试，只能用数字万用表高阻档检查软启动器中晶闸管的绝缘情况。新的软启动器（冷态时）每组晶闸管输入输出端子间测量电阻值应指示1.3M左右，相间（相间未接控制回路时）、相对地测量电阻值应该指示为无穷大。在电动机与软启动器连接前，必须用500V绝缘电阻测试器检查电动机和电缆的绝缘状态。只有绝缘电阻符合有关规定，才准许将电动机连接到软启动器输出端进行启动试验。检查确认无误后，连接电动机并设定启动方式、初始电压、启动时间和停机时间等技术参数。然后进行空压机启动试验和参数优化。三、总结自改造后的一年多来，空压机运行很正常，能够很好满足公司生产要求。软启动器是性能比较好的电动机启动控制设备，由于在电动机空载或轻载时采用软启动器的节能模式提高了电动机的功率因数并减少输电线路和供电变压器的损耗因此起到节能作用，软启动技术应该得到推广应用。查看更多 0个回答 . 1人已关注

关注问题已关注 回答

登录后参与回答

出现这个问题该如何解决？在模拟后，出现下面的问题，该怎么解决？ * WARNING AT Z = 0.19850E-05 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.42778E-05 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.63412E-05 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.94364E-05 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.14079E-04 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.21043E-04 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.31490E-04 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.47159E-04 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.70663E-04 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.10592E-03 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.15880E-03 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.23813E-03 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.35712E-03 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.53561E-03 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.80333E-03 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.12049E-02 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.18073E-02 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.27109E-02 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.40663E-02 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.60993E-02 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.91489E-02 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.13723E-01 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.20585E-01 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.30877E-01 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.46316E-01 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.69473E-01 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.10421 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.15632 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.23447 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.35171 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.52756 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.79134 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 1.1870 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 1.7805 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 2.6708 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 4.0062 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 6.0093 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 9.0139 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. Block: COOLER2 Model: HEATER Block: SEP2 Model: FLASH2 Block: REBOIL2 Model: HEATER Block: CLAUS2 Model: RPLUG * WARNING AT Z = 0.87000E-01 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 0.95700 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. * WARNING AT Z = 9.6570 : REACTION RATE IS GREATER THAN ZERO FOR REACTION (2) BUT REACTANT "COS" IS NOT PRESENT. POSSIBLE CAUSE: ZEROTH ORDER REACTANT NOT PRESENT. RATE IS SET TO ZERO. Block: COOLER3 Model: HEATER Block: SEP3 Model: FLASH2 Block: MIXER Model: MIXER ->Generating block results ... Block: COOLER1 Model: HEATER Block: REBOIL1 Model: HEATER Block: COOLER2 Model: HEATER Block: REBOIL2 Model: HEATER Block: COOLER3 Model: HEATER ->Simulation calculations completed ... *** No Warnings were issued during Input Translation *** *** Summary of Simulation Errors *** Physical Property System Simulation Terminal Errors 0 0 0 Severe Errors 0 0 0 Errors 0 0 0 Warnings 0 0 41 查看更多 6个回答 . 4人已关注

关注问题已关注 回答

登录后参与回答

上一页71 72 73 74 75 76 77 78 79 80 81下一页

简介

职业：山东沾化奥仕化学有限公司 - 给排水工程师

学校：漳州师范学院 - 化学与环境科学系

地区：贵州省

个人简介：在人的生活中最主要的是劳动训练。没有劳动就不可能有正常人的生活。查看更多

喜爱的版块返回首页

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