barriers / 阅读 / 详情

lingo的解连约束条件都不能满足。

2023-08-24 21:06:51
共2条回复
陶小凡

一种可能的情况是问题可能不存在可行解。

大鱼炖火锅

你截取的这部分求解是有x为1的 应该是你没看清楚吧

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2023-08-18 11:31:234

raised in

试译:陶瓷制品还包括汉代铅釉墓葬精品,唐代三彩铅釉器皿和塑像,和以泥釉凸纹来展现图案轮廓的明代三彩庙饰————以及模仿贵重材料器皿而烧制的诸多入葬陶瓷品。分析:1、这句话的主语是ceramic products;谓语是include;宾语包括tomb models,vessels and figures,temple ornaments,和burial ceramics。2、破折号起补充的作用,其后仍是include的宾语,连接成分as well as相当于and。3、which引导非限制性关系从句(又叫定语从句),其先行词是ornaments。这个定语从句的意思是:庙饰上的各种图案,是用一种凸起的泥釉线条来展现轮廓的。4、model此处意为“a thing regarded as an excellent example of a specified quality”,结合语境译为“精品”,因为能入葬的器具品质当属上佳。5、slip此处意为“a creamy mixture of clay, water, and typically a pigment of some kind黏土、水和某种颜料调制成的奶油状混合物”,汉译“泥釉”。6、produced一直到结尾是过去分词作后置定语,限定ceramics。其中, in imitation of vessels是介词结构作方式状语,修饰动词produced;而made in materials of higher intrinsic value又是过去分词作后置定语,限定vessels。7、of higher intrinsic value字面意为“具有更高内在价值的”,其实就是“贵重”之意。【声明】对motif语境意思的把握初有偏差,参考之后回答的“彼采萍兮”的意见进行了改动。
2023-08-18 11:31:511

empty vessels make the most noise 中文解释是什麼?我不要直译!我要的是它背後的意思!!!

无知的人叫得最欢
2023-08-18 11:32:022

关于巴基斯坦信用证问题,求解~!

1、COPIES SUCH SHIPMENT ADVICES TO ACCOMPANY THE ORIGINAL DOCUMENTS这个以前给你翻译过了呀,没看呀?还是没看懂呀?5、如果做不到,建议客户删掉,一般都是开证申请时开证行的申请书上现有的,客户也搞不清楚就照搬了,做做工作让他删掉这一条吧。9)这样写WE HEREBY CERTIFY THAT PACKING LIST AND INVOICE HAVE BEEN PACKED IN THE SEALED CONTAINERM,THE SAME HAVE BEEN PLACED INSIDE THE CONTAINER.(上述证明是假设你的货物是装在集装箱里的,其他的情况你类似地做,证明不是照抄,照抄反而成了不符。)
2023-08-18 11:32:111

请教高人:有关信用证条款的若干问题

这三个是船证,整柜的话船公司出,拼箱的话,拼箱公司出。是中东开出L/C常见的要求。第一个,是说船只允许进入阿拉伯的任何港口而且不违规。we hereby cerfity that the ccarrying vessel is permitted to enter any Arab port in accordance with their local laws and regulations.第二个,是说船只拥有一个ism编码,就是国际安全编码,这个没有问题,we hereby certify that the carrying vessel(indicating the name of the vessel/s)hold(s) a valid international safety management certificate(ISM code).这样就ok了,我们经常做。第三个是说船只符合国际船级公约。we hereby certify that shipment has been effected by conference or regular line vessels,covered by the new institute classification clause dated o1-Jan.-2001. 分别交给货代让船公司盖章就行了。
2023-08-18 11:32:191

the reactor vessels have held.这里的held的翻译成什么啊?还有这句话About 2,000 bodies were found was

控制住周一大约有2000具尸体被发现冲向海岸线
2023-08-18 11:32:274

The empty vessels make the greatest sound .什么意思?

满瓶不响,半瓶咣当
2023-08-18 11:32:374

什么是半潜船

半潜船也称半潜式母船,它通过本身压载水的调整,把装货甲板潜入水中,以便将所要承运的特定货物(像驳船、游艇、舰船、钻井平台等)从指定位置浮入半潜船的装货甲板上,将货物运到指定位置。半潜船的主要工作原理非常类似于潜艇,所不同的是,潜艇要全部没入水下,而半潜船只要下潜一半,这就是半潜船名字的来历。在装卸时,它通过本身压载水的调整,把装货甲板潜入水中,使装货甲板的最高处,低于特定货物(像驳船、游艇、舰船、钻井平台等)的最大吃水。这些货物就可以利用自身动力或者拖拽,直接浮到半潜船的装货甲板上方。这时半潜船再通过排出压载水,船体上浮,使货物可以直接落在装货甲板上,并绑扎规定,就可以将货物运到指定位置。卸货时,采用于装货时相反的步骤。
2023-08-18 11:32:476

连接淋巴结的管道是什么?

(1)淋巴结:哺乳类特有的周围淋巴器官,由淋巴细胞集合而成。呈豆形,位于淋巴管行进途中,是产生免疫应答的重要器官之一。淋巴结的一侧隆凸,连接数条输入淋巴管,另一侧凹陷,称为“门”,有输出淋巴管和神经、血管出进。淋巴结表面包有被膜,被膜的结缔组织伸入淋巴结内形成小梁,构成淋巴结的支架。被膜下为皮质区。淋巴结的中心及门部为髓质区。皮质区有淋巴小结、弥散淋巴组织和皮质巴窦(简称皮窦)。髓质包括由致密淋巴组织构成的髓索和髓质淋巴窦(简称髓窦)。淋巴窦的窦腔内有许多淋巴细胞和巨噬细胞。从输入淋巴管流来的淋巴液先进入皮窦再流向髓窦,最后经输出淋巴管离开淋巴结。淋巴结的主要功能是滤过淋巴液,产生淋巴细胞和浆细胞,参与机体的免疫反应。淋巴结肿大或疼痛常表示其属区范围内的器官有炎症或其他病变。因此按淋巴结分布规律检查淋巴结的情况,对诊断和了解某些感染疾病的发展具有重要意义。(2)囊肿:任何年龄均可发生,以青年时期头面、臂、背部发病多见。为一柔软或坚实的球状物,直径1~3cm不等。粉瘤埋藏于皮肤或皮下组织内,与皮肤粘连,基底可移动。皮表可见开口小孔,推动囊肿时,此处与皮肤粘连甚紧,并见略微凹陷而出现小坑,即为直接通达皮肤表面的腺体所在导管开口。有的开口处塞着一个黑色粉刺样小栓可挤出白色蜡样物质。发病多年而无症状,易继发感染,化脓破溃,有的奇臭难闻。文献报告有癌变,多数转变为基底细胞癌,少数变为鳞状细胞癌,癌变率约2.2%~4%。发生发展是内外两方面因素共同作用的结果,因此,囊肿主要随其生长的环境变化而变化,感染肾毒物质、情志、劳累、饮食等外界因素的变化有直接影响囊肿生长的速度,这样就出现了囊肿生长时快时慢的现象,即具有不同阶段生长速度不一样的特点。
2023-08-18 11:34:342

请翻译:Empty vessels make the greatest sound

虚心使人进步。
2023-08-18 11:34:423

emptyvesselsmakethemostnoise是什么意思

一桶水不响,半桶水叮当。
2023-08-18 11:34:553

托福阅读常见十种题型

2017托福阅读常见十种题型   导语:托福阅读重点考察考生的阅读理解和对于信息提取的能力,下面我解析托福阅读的十种题型,欢迎参考!   阅读文章中出现的长难句常是考生阅读中遇到的一大难点,而托福阅读十种题型中的句子简化题更是针对文章中的长难句进行了重点考察。所以,考生在平时备考过程中要注重句子结构的分析和主干信息的提取。要想分清楚句子结构,对于常见的修饰成分要搞清楚。所以在准备阶段,注重句法的知识积累就显得格外重要。   一、常见的五种后置定语要清楚。   对于基本的句子结构,主谓宾或是主系表大家都比较熟悉,但是对于句子里的修饰成分,大家往往熟悉名词之前的修饰成分,也就是对于前置的定语非常熟悉,但是对于名词之后的修饰成分也就是后置定语往往并不了解,或者即使了解,概念也较为模糊。后置定语,顾名思义分为后置和定语两个部分。后置也就是此种短语出现的位置是在名词之后,定语就是起到起到修饰限定作用的短语,注意是短语而不是句子,本质上相当于形容词。所以后置定语就是放在名词的后面起到限定修饰作用的短语。基本可以划分为五种情况。   1,形容词做后置定语。如:fossil available.即为可用的化石。   2,介词短语做后置定语。如lava on the surface,中 on the surface介词短语修饰lava,表示为表面上的熔岩。   3,现在分词短语做后置定语。如the blood vessels carrying cooled blood.中的carrying cooled blood就是现在分词短语用来修饰限定the blood vessels,理解为运载着凉的血液的血管。   4,过去分词短语做后置定语,the gradual drying of the soil caused by its diminished ability中的caused by its diminished ability就是过去分词短语做后置定语修饰the gradual drying of the soil,理解为减少的能力导致的土壤的干燥。   5,不定式短语做后置定语。the ability to absorb water中to absorb water限定修饰 the ability,理解为吸收水的能力。   二、句子之间的逻辑关系要抓住。   在了解了句子结构的基础之上,句子内部以及句子之间的逻辑关系也是非常重要的。   常见的逻辑关系有:   1,转折:but, however, yet 转折关系重在强调转折单词之后的内容。   2,让步:although,though,even though,even if,despite,in spite of,nevertheless。让步关系出现在句中时,强调的是后半句,前半句被弱化。   3,比较对比:more/less than, most, as…as , while, whereas。尤其注意对比种可能多个逻辑关系词柔和在一起,如既有whereas的对比,又有more…than的比较。   4,条件:if, only if, except, unless, provide that, as long as。   5,因果: because (of) ,since, as, why, for, therefore, hence, thus, thereby, consequently, accordingly, lead to, as a result (of),result in, result from, reason, A contribute to B, attribute/ascribe A to B, explain, come from, so A that B,A be responsible for B等等。在因果关系中要注意区分谁是结果,谁是原因。   在熟悉掌握句子的"修饰成分和逻辑关系之后,遇到长难句时,阅读句子将不再是一个个单词的累积,而是意群的组合。这样清楚地划分出句子主干后,理解起来将会容易得多。   例如:TPO15考察的句子简化题。In a countercurrent exchange system, the blood vessels carrying cooled blood from the flippers run close enough to the blood vessels carrying warm blood from the body to pick up some heat from the warmer blood vessels; thus, the heat is transferred from the outgoing to the ingoing vessels before it reaches the flipper itself. 就可以拆分为:In a countercurrent exchange system, the blood vessels( carrying cooled blood from the flippers) run close enough to the blood vessels( carrying warm blood from the body )to pick up some heat from the warmer blood vessels; thus, the heat is transferred from the outgoing to the ingoing vessels before it reaches the flipper itself.   句子逻辑关系词为thus,因此是因果关系,且前因后果。carrying cooled blood from the flippers和carrying warm blood from the body两个均为分词短语做后置定语限定修饰前面的blood vessels,这两个修饰成分搞清楚,句子结构就明朗了。即,在逆流的交换体系里,从鳍中流入的带着冷血的血管与中从身体里流出的带着暖血的血管紧密排列,因此,热量就可以在到达鳍之前,从流出的血管转移到了流入的血管中。   句子结构和逻辑关系对于解答句子简化题和阅读文章的长难句都非常重要,所以大家在阅读文章时要养成精读句子,划分句子结构,提取主干信息的好习惯,点滴积累,调高阅读的速度和理解的能力。 ;
2023-08-18 11:35:021

以my body healthy为题的英语作文

How to Keep HealthyHow to keep healthy? This is a concern for everyone of us. To have a good health, we need to pay attention to the following. Firstly, no matter what has happened, we need to keep calm and happy. We should remember it is harmful to the health if a person often gets irritated or in dismay. If we have got any unpleasant news, we should not keep it in our minds, but say it out to our friends. Thus we may get relieved from the unhappy event. Secondly, we need to pay attention to eating healthy food, e.g. various kinds of grain, fruits or vegetables. One shouldn"t eat too much fat every day. Fats contain much cholesterol which is liable to be stuck on the inner walls of the blood vessels. If our blood vessels have been hurt, this will lead to cardiac trouble. In that case, we need to take some deep sea fish-oil with omega three to get rid of the rubbish in our blood and get our blood vessels cleaned. Healthy blood vessels can promote a long life. Thirdly we need to do some appropriate physical exercises. For youngsters they like to do something energetic like running, jumping or weight lifting, etc. For the aged, they may do some mild movements like walking, jogging, playing Chinese Taiji or having yoga practice. As long as we have physical exercises every day, we can keep healthy. However in case one is seriously ill, one needs to go to see the doctors immediately.
2023-08-18 11:35:291

翻译求助

我的翻译是这样的 船主将提出7至20天的临时性通告和一天内的最后卸货口岸的通告,这样的通告将在正常的工作日内有效,无论船舶靠岸与否
2023-08-18 11:35:432

【MUN立场文件。索马里海盗。追加分】

哈哈,你算是找对人了,我们学校也是这个议题哦。接好了Delegate: your namesSchool: your SchoolCountry: Saudi ArabiaCommittee: Security CouncilTopic: Security of Maritime Trade-Somalia Piracy IssueSomali pirates, a group of specialized vessels at sea robbery, theperpetrators of other countries. The outbreak of civil war in Somalia in1991, so the Gulf of Aden piracy in this area more frequently, haverepeatedly hijacked, the crew violence incidents. Somali pirates havebecome a major international menace to international shipping andmaritime security poses a serious threat. Gulf of Aden and Red Sea in theIndian Ocean between the Red Sea and from the Indian Ocean throughthe Suez Canal into the Mediterranean Sea and Atlantic Ocean throat,strategic importance. Rampant piracy off Somalia South Africa"s Cape ofGood Hope bypass forced many vessels do not pass the Suez Canal inEgypt, this threat to international maritime trade, leading to vesseldeparture and increase in freight cost, commodity inventories tight.Somali coastal areas increasingly rampant piracy is a serious threat tointernational maritime trade and regional security. To this end, theinternational community should strengthen cooperation and increase theintensity action against Somali pirates; including taking military actionagainst Somali pirates extend the mandate of the sea to the land ofSomalia. This month the UN Security Council adopted resolution No.1851, decided to license the fight against Somali pirates to Somalia toexpand the scope of the land from the sea, and has focused on thestrengthening of international cooperation and coordination. Opinion hereis that, in addition to the marine escort action to prevent pirate attacks, theinternational community should send peacekeepers to Somalia to promotepeace and stability in Somalia. However, given the risks still existedinstability in Somalia, the United Nations to send peacekeeping forcesthat the present time is not ripe.Saudi Arabia emphasized the following points:1. The international community should respect the sovereignty, unity ofSomalia, independence and territorial integrity. Somali piracy in thecoastal regions of the country"s political, humanitarian and securitysituation continues to deteriorate. The participants welcomed the UnitedNations and other regional and international level to promotecomprehensive national reconciliation in Somalia.2. Saudi Arabia unreservedly condemn all acts of piracy and armedrobbery, regardless of whether they occur within the Somali territorialwaters, or far away from the open sea off the coast of Somalia. They areespecially felt indignation is November 19, Saudi oil tanker was hijacked.3. The Arab countries adjacent to the Red Sea to the Somali coast,Western Indian Ocean and Gulf of Aden piracy escalating concerns. Theyare determined to strengthen cooperation and mutual agreement in orderto combat this trend and to prevent it from spreading to the Red Sea.4. The Arab countries adjacent to the Red Sea to ensure maritime safetyand maritime security threats should have primary responsibility.Consider these national territorial waters adjacent international watersprogram must negotiate with these countries.5. Saudi Arabia supported the fight against piracy of regional andinternational efforts. However, these efforts must comply with therelevant principles of international law and should respect all the nationalterritory and territorial waters of sovereignty, taking into account theexisting security measures of short-term in nature and how they relate toSomalia"s political and security situation of contact. According to theSecurity Council the 1816 (2008) and 1838 (2008), these measureswhether in law or in practice should not constitute a precedent.6. Saudi Arabia stressed the need to strengthen Arab-African cooperationagainst piracy, particularly near the Red Sea cooperation among States.7. Recommends the establishment of the Arab countries adjacent to theRed Sea in relation to the composition of the joint bodies, with a view tocontributing to the Red Sea in maritime safety and security and theprevention of piracy to the area of possible spread. The military should beheld as soon as possible, legal, technical and Economic Committee of theConference, to do this.8. The Arab countries adjacent to the Red Sea should ensure they have theability in its territorial waters in the monitor, investigate and eliminatepirates into any attempt to the Red Sea, both in the Western Indian Oceanor Gulf of Aden to piracy, or escape and the confrontation against piratevessel.9. The Arab countries adjacent to the Red Sea is willing to consider andpropose initiatives against pirate parties engaged in a dialogue and inrespect of these initiatives and the Indian Ocean and Gulf of Aden in theWest of the regional and international arrangements.10. In view of the fight against piracy and armed robbery at seacoordination work, maybe you can take advantage of the InternationalMaritime Organization of frame established Yemen regional coordinationand information exchange centre.11. Saudi Arabia welcomes according to each country"s desire to adjacentto the Red Sea and Gulf Arab countries in capacity building activitiesagainst the pirates, at its discretion, provide technical and materialsupport of various international initiative.Saudi Arabia to international cooperation on the convoy positive, openattitude is willing to international law and relevant resolutions of theSecurity Council framework, with all relevant countries and organizationsin various forms of bilateral and multilateral cooperation escort,communications against Somalia pirate threat.Recommends that the international community in the fight against piracyshould be strict compliance with international law and relevantresolutions of the Security Council, with full respect for the coastal statesovereignty and territorial integrity, especially with the SomaliTransitional Federal Government should be to maintain communicationand consultation. The international community should also help stabilizethe security situation in Somalia and to help countries build capacitywithin the region.后面的那些点可以加入你的WP的。唉,想当年,谁有帮我写过PP额,想在来帮帮后来人把。能加分吗?嘻嘻嘻,我说不定一高兴把BG都给你哦
2023-08-18 11:35:511

为什么要在下雪结冰的公路上撒盐?

要从盐的化学成分说起。盐的成分是氯化钾,雪的成分是水。氯化钾是极溶于水的化学物质。氯化钾溶于水后生成氯化钾水溶液,其中含有钾离子和氯离子。水要结冰时,有氯离子和钾离子存在时,氯离子和钾离子会破坏水的结晶网状结构,使水不能结冰。也就是说,盐能使雪不结冰。再说,盐的代价便宜,并且没有污染。因此,下雪时,经常给路面撒盐,防止雪水结冰。
2023-08-18 11:34:062

feel pain中pain是什么词?为什么不说feel painful呢?

painful 的意思是“使人感到疼痛的”、“使人感到痛苦的”,所以它通常只能用来说明事物,不宜用来说明人所以只能选pain
2023-08-18 11:34:081

计算机丢失sncapi.dll怎么解决

如果DLL缺失怎么办呢?其实也很简单,我们只需要下载对应的DLL文件即可。比如电脑缺少d3dx9-29.dll,我们就在网站搜索一下这个d3dx9-29.dll文件www.jb51.net/dll/d3dx9_29.dll.html点击下载,我们把文件放到WINDOWS目录下的system32文件夹下这个时候电脑提示“通知dll尚未注册,程序将无法正常运行。”这个时候我们就需要DllErrorsFix DLL修复工具了,点击修复就能解决DLL缺失的问题。DllErrorsFix DLL修复工具下载:www.jb51.net/softs/102703.htmlDllErrorsFix中的救援是什么意思?这个救援其实就是恢复DLL修复之前的备份,点击一下名称,点击恢复即可.(如果之前有备份可用)当然,我们还可以手动注册1.将对应版本的 dll文件复制到“ C:Windowssystem32 ” 2.在开始菜单中找到“运行(R)” 或者按快捷键 Win+R 。3.在“运行(R)” 中输入 “ regsvr32 d3dx9_29.dll” (不含双引号) 回车即可。
2023-08-18 11:34:111

skyline模拟器画面反过来了

系统故障。《skyline模拟器》是一款非常优秀的游戏模拟器软件,当skyline模拟器画面反过来了时,是由于系统故障导致的,卸载重新下载即可解决。游戏模拟器,模拟器是一种程序,意为仿真器。可以使电脑或者其他多媒体平台能够运行其他平台上的程序,多为电视游戏和街机模拟器。
2023-08-18 11:34:131

冰上撒盐是利用什么原理?

冰上撒盐是利用什么原理?这是什么原理呀?没太明白你说的呀!
2023-08-18 11:34:159

谁能帮我翻译下这个意大利的地址,谷歌找不到啊

这地址缩写太多,难怪您找不到 !C.da - Contrada, 可以理解为 镇、区、郊区......SP - Strada Provinciale, 类似国内的省道;SNC - senza numero civico, 意思是 没有门牌号;CT - Catania, 卡塔尼亚,西西里岛东海岸的一个城市。意大利 卡塔尼亚市 贝尔帕索镇 罗通带拉区 77 号省道,邮编:95032注:77省道很长,贯通区域很广,大多数是农耕地、园林和 苗圃;要将邮件准确送达,只能靠邮编和公司名称。符合这些条件的有一家苗圃培育基地,Imbrogiano Salvatore Vivai。
2023-08-18 11:34:201

skyline模拟器手机怎么打不开游戏

skyline模拟器手机打不开游戏的原因:1、关闭重新启动该应用。2、建议将此软件卸载重新安装尝试。3、更换其他版本尝试。4、更新下手机系统版本后安装尝试。5、备份手机数据(电话簿、短信息、多媒体文件等),恢复出厂设置后重新安装尝试。6、恢复出厂后依旧无法使用,同时其他第三方软件可以正常使用,只有此软件不能正常运行,是与手机系统存在兼容性问题。将手机送至就近的服务中心进行检测及进一步处理。
2023-08-18 11:34:201

功放机与DVD有什么区别?DVD是不是没有功放的功能?

DVD不完全具备功放的功能。功放机与DVD的主要区别如下:一、原理不同1、功放机:功放好比一台电流的调制器,它将交流电转变对直流电,然后受音源播放的 声音信号控制, 将不同大小的电流, 按照不同的频率传输给音箱, 这样音箱就发同相应大小、 相应频率的声音了。2、DVD:DVD分别采用MPEG2技术和AC3标准对视频和音频信号进行压缩编码。它可以记录135分钟的图像画面。二、作用不同1、功放机:把来自音源或前级放大器的弱信号放大,推动音箱放声。2、DVD:是一种光盘存储器,通常用来播放高质量的电影,歌曲与作储存资料用途。三、特点不同1、功放机:在中低档的日本产品中,虽然在音色上仍然有生硬的现象,但如果在相同售价下和欧美的产品相比较,日本的产品往往显得超值。在搭配上,如果用中价位的日本产功放机和欧美的音箱(如天龙和Kef,雅马哈和B&W)相配而性能互补,那么在音色上也会有令人满意的效果。2、DVD:高速度旋转的盘片容易产生震动、发出噪音、产生更大的热量,其中震动会使激光头定位难度增加,必然导致寻道时间变长。因此在光驱倍速增加的同时,激光头的传动机构和定位系统也一直在发展,这样才能保障在提高倍速的同时,降低寻道时间。参考资料来源:百度百科-DVD百度百科-功放机
2023-08-18 11:34:271

skyline模拟器可以用金手指吗

可以。Skyline是一款实验性模拟器,skyline模拟器可以用金手指,使用金手指加速代码,不定期更新模拟器。skyline模拟器,是一款由国外爱好者开发的仿制软件,技术很出色,由多位开发者一起开源,提供源码。
2023-08-18 11:34:281

凯文·罗奇的凯文·洛奇(KEVIN ROCHE)代表作品

DEERE WEST办公大楼,福特基金会大楼,联邦广场饭店,奥克兰博物馆
2023-08-18 11:34:331

李冰冰曾跪拜,马云亲自登门拜访,“气功大师”王林真有那么神?u200b

走火入魔邪魔外道遭天谴
2023-08-18 11:33:598

功放机低音输出0.2表示什么

功放机低音输出0.2表示功放输出直流电压。功放输出理论上直流电压应该为零,实际上一般有0.2V左右或更高一些,这个电压越低越好。0.1或者是0.2的声道都是重低音声道。功放在工作时,输出的是正弦波交流电压,电压值随音乐大小波动,可以用万用表交流档测量。功放机工作原理功放机可以将音源播放的各种声音信号进行放大以推动音箱发出声音。从技术角度看,功放好比一台电流的调制器,它将交流电转变为直流电,然后受音源播放的声音信号控制,将不同大小的电流,按照不同的频率传输给音箱,这样音箱就发出相应大小、相应频率的声音了。
2023-08-18 11:33:581

四氯化锡的性质

结晶四氯化锡与无水四氯化锡的化学性质没有本质的差异。结晶四氯化锡分子式:SnCl4·5H2O 分子量:350.58(按1977年国际原子量) 本品为白色吸水性块状结晶 ,溶于水、醇,有盐酸气味,具有腐蚀性。 技术要求: 一级 二级 1. SnCl4 。5H2O含量不少于 99% 98% 2. 硫酸盐(SO4) 0.005 0.01 3. 铁 (Fe) 0.001 0.002 4. 锑 (Sb) 0.005 0.01 5. 砷 (As) 0.0005 0.001 6. 硫化氢不沉定物(以硫酸盐计) 0.05 0.01 无水四氯化锡 化学式:SnC14 分子量:260 比 重:2.24 沸 点:112 理化性质 本品为无色或淡黄色液体,遇空气发烟,有刺激性气味并具腐蚀性。可溶于丙酮,苯,醚类等有机溶剂。遇水剧烈反应,并放出大量热
2023-08-18 11:33:551

为什么在雪上撒沙子撒盐会让雪化得快?

这是溶液的特性——稀溶液的依数性所决定的。难挥发非电解质稀溶液的依数性是指难挥发非电解质稀溶液的蒸汽压下降、沸点上升、凝固点下降、渗透压等现象只与溶液的浓度呈正比关系,而与溶液的溶质种类无关。电解质溶液也具有如上所述的现象,但不简单符合正比关系。雪花是纯净物,加入盐后就变成了难挥发的电解质稀溶液,于是使得整个体系的凝固点(即熔点)下降,因而使雪花更快融化。
2023-08-18 11:33:552

skyline模拟器如何加载dlc

已经进入模拟器,在模拟器里面打开游戏就可以加载dlc了
2023-08-18 11:33:4912

12306@rails.com.cn是铁道部的邮箱吗?

中国铁路客户服务中心意见反馈邮箱
2023-08-18 11:33:445

love is pain 还是love is painful?有什么区别?哪种描述更准确?

为什么恋爱会这么痛?如果帮到你,请记得采纳,O(∩_∩)O谢谢
2023-08-18 11:33:432

12306@rails.com.cn这是怎么回事

可能是有人用你的账号办的!
2023-08-18 11:33:352

下雪在路面上撒盐可以使雪很快融化的原因是什么

正常水的冰点是0摄氏度,但是加入盐(NaC1,并不一定非得是食盐)之后,水的凝固点降低,变得小于0度了,这就是撒盐化雪的道理。但这么做有两个弊端,一是凝固点降低有限,太冷的天气一样不行。二是盐分对道路有腐蚀作用,长期使用破坏路面。 所以现在很多城市都用专门的除雪剂了,除雪剂和盐降低水的凝固点的作用类似,但具体实现过程还是有区别的。主要是通过融冰除雪剂的吸水性和融化时大量放热,使雪中的结构晶格错位,导致冰雪融化。冰雪融化后吸热,使周围的温度下降,这时溶液的蒸汽压小于冰雪的蒸汽压,为了达到新的平衡,促使冰雪不断融化,形成溶液,从而降低了水的凝固点,在低温条件下,上述复杂运动的平衡过程周而复始地进行,这就是除雪剂融冰除雪的融冰化雪原理。
2023-08-18 11:33:322

祝妈妈圣诞快乐英文

祝妈妈圣诞快乐Merry Christmas to Mom.在任何一个社会文化中,都有对于母亲应扮演角色职责的期望和规范,此即母亲角色(Motherhood),例如在传统中国,母亲被期望扮演教育子女的重要角色。妈妈,这是一个人最先学会的词汇,也是世界上最美妙的语言。世界上的语言,成百上千,数量众多,但妈妈一词的发音,都极为相似,这不是巧合,这是对伟大母爱的共同赞美。妈妈一词自古就有,例如《经鉏堂杂志》这部小说就是南宋人写北宋的事情。例如在这部小说,第一节,四事中 有一段皇帝为太后祝寿的话,我引用下来。
2023-08-18 11:33:302