bigsunsun001
我们上学的时候没有学过跌倒开关，所以我在网上搜了一下，发现很多人问过这个问题，我把它复制在下边，希望对你有帮助，不过我建议你还是请教一下同学或者物理老师，我也会继续研究一下的~跌倒开关S是属于常开开关，只有在取暖器站立时跌倒开关才是使用常闭开关。在如图中B C 是使用跌倒开关S常开开关，它是不通电的，只有A D 才 是使用跌倒开关的常闭开关。但是图D中任意一个开关(S1 S2 S )不闭合都不会通电，就不存在冷风与热风选择。图A 在闭合S1与S时就是送冷风，同时闭合S1 S2 S 时就是送热风。 我教你怎么看常开与常闭，如图开关S的黑粗线在线路图中的细线上面就是使用常开的开关，在线路图下面就是使用常闭开关。
兔几小兔几
tour[tuE]n.旅行, 游览; (剧团等的)巡回演出; 巡回医疗【军】在海外的陆海军基地的服务期(轮值的)班任期周转, 流通, 循环a bridal tour新婚旅行a foreign tour国外旅行a tour of inspection视察旅行circular tour周游, 环行collective tour团体旅行inspection tour巡回检查package tour由旅行社代办全部事宜的观光旅游tourvt., vi.旅游, 观光; 巡回使(剧团等)巡回演出; 巡回医疗tourern.游览车, 观光者tourism[5tJErIz(E)m]n.旅游, 旅游业go on a tour漫游, 巡回, 周游make a tour of the world周游世界on tour漫游中; 周游或巡回中the grand tour【史】英国大学生毕业前的大陆旅行(上流社会子弟作为毕业的最后一部分)tripAHD:[tr筽]D.J.:[trip]K.K.:[tr!p] n.A going from one place to another; a journey.A stumble or fall.A maneuver causing someone to stumble or fall.A mistake. SlangA hallucinatory experience induced by a psychedelic drug:an acid trip.An intense, stimulating, or exciting experience:a power trip. SlangA usually temporary but absorbing interest:a health food trip.A certain way of life or situation:背eny that his reclusiveness is some sort of deliberate star trip?Patricia Bosworth)A light or nimble tread.A device, such as a pawl, for triggering a mechanism.The action of such a device.trip v. tripped; trip.ping; trips;trip v.intr.To stumble.To move nimbly with light, rapid steps; skip.To be released, as a tooth on an escapement wheel in a watch.To make a trip. SlangTo have a drug-induced hallucination.trip v.tr.To cause to stumble or fall.To trap or catch in an error or inconsistency.To release a catch, trigger, or switch, thereby setting something in operation. NauticalTo raise (an anchor) from the bottom.To tip or turn (a yardarm) into a position for lowering.To lift (an upper mast) in order to remove the fid before lowering.trip the light fantasticTo dance.trip up onTo make a mistake:tripped up on the last question.Middle English[ act of tripping ]from trippen[ to trip ]fromOld French tripper[ to stamp the foot ][ of Germanic origin ]tripAHD:[tr筽]D.J.:[trip]K.K.:[tr!p] n.A going from one place to another; a journey. 旅行，旅游，出行从一地行进到另一地的过程：旅行A stumble or fall.摔倒，绊倒或跌倒A maneuver causing someone to stumble or fall. 绊使某人绊倒或跌倒的动作A mistake.错误 Slang 【俚语】A hallucinatory experience induced by a psychedelic drug: 幻觉服用迷幻剂而引起的一种迷幻的经历：an acid trip.酸的迷幻感觉An intense, stimulating, or exciting experience: 刺激性的体验，兴奋一种紧张的、刺激性的，或令人兴奋的体验：a power trip.一次强有力的刺激性体验 Slang 【俚语】A usually temporary but absorbing interest: 迷恋，热衷一种通常是短暂的但很专注的兴趣：a health food trip.对于健康食品的迷恋A certain way of life or situation:某种生活方式或状况：背eny that his reclusiveness is some sort of deliberate star trip?Patricia Bosworth)“否认他的闭门谢客是某种精心设计的明星生活方式”(帕特里西亚·博斯沃思)A light or nimble tread.轻捷的步伐A device, such as a pawl, for triggering a mechanism. 启动装置一种启动某一机械设置的装置The action of such a device. 启动运动这种装置的运动trip v. tripped; trip.ping; trips;trip v.intr.To stumble.绊倒，绊To move nimbly with light, rapid steps; skip. 轻快地走轻捷地走，跳，以轻快的步子敏捷地移动To be released, as a tooth on an escapement wheel in a watch. 松开而开动放松、开动，如钟表上的摆轮的一个齿To make a trip.旅行，旅游、出行 Slang 【俚语】To have a drug-induced hallucination.绊、将…绊倒，使摔倒trip v.tr.To cause to stumble or fall. 使犯错误使失误，诱导某人犯错误或抓住某人的前后不一致To trap or catch in an error or inconsistency.由药引起的迷幻To release a catch, trigger, or switch, thereby setting something in operation. 松开而开动松开离合器、控制杠、开关等以开动 Nautical 【航海】To raise (an anchor) from the bottom.起（锚）To tip or turn (a yardarm) into a position for lowering. 放帆倾斜或转动（桁端）至某一位置以使将其放倒，To lift (an upper mast) in order to remove the fid before lowering. 竖帆在放倒前，先抬起（上桅杆）以便拔去销钉trip the light fantasticTo dance.跳舞，舞蹈trip up onTo make a mistake:犯错误，失误：tripped up on the last question.在最后一个问题上犯了错误Middle English[ act of tripping ]中古英语[ 绊倒的行为 ]from trippen[ to trip ]源自 trippen[ 绊倒 ]fromOld French tripper[ to stamp the foot ]源自古法语 tripper[ 跺脚，用脚踩踏 ][ of Germanic origin ][ 源于日耳曼语 ]travelAHD:[tr瞯搮l]D.J.:[6tr#v*l]K.K.:[6tr#v*l] v. trav.eled; or travelled trav.el.ing; or travelling trav.els; or travelstravel v.intr.To go from one place to another, as on a trip; journey. 旅行从一个地方去往另一个地方，如在旅行中；旅行To go from place to place as a salesperson or an agent. 旅行推销作为推销员或代理商在各个地方旅行To be transmitted, as light or sound; move or pass. 传送被传送，如光或声音；移动或通过To advance or proceed.前进，行进To go about in the company of a particular group; associate: 来去在一个特定的群体中交往；联系：travels in wealthy circles.与富裕阶级来往To move along a course, as in a groove. 移动沿着一条路线移动，如在沟槽中To admit of being transported without loss of quality: 运送可以不损害其质量的运送：Some wines travel poorly.有些酒经不起运输的颠簸 Informal 【非正式用语】To move swiftly.快速移动 Basketball 【篮球】To walk or run illegally while holding the ball. 走步持球时不合规则地走动或跑动travel v.tr.To pass or journey over or through; traverse: 通过，游历通过或旅行通过；通过：travel the roads of Europe.周游欧洲travel n.The act or process of traveling; movement or passage from one place to another. 旅行旅行的动作或过程；从一个地方到另一个地方的运动或路程travelsA series of journeys. 旅程一系列的旅程An account of one's journeys. 游记对某人游历的记述Activity or traffic along a route or through a given point. 游行沿某一条路或通过一点的运动或通行Middle English travelen中古英语 travelenalteration of travailen[ to toil ] travailen的变化[ 辛劳 ]fromOld French travailler源自古法语 travailler*See Also : travailjourneyAHD:[j鹯搉禲D.J.:[6d/*8ni8]K.K.:[6d/)ni] n. pl. jour.neys;The act of traveling from one place to another; a trip.A distance to be traveled or the time required for a trip:a 2,000-mile journey to the Pacific; the three-day journey home.A process or course likened to traveling; a passage:the journey of life.journey v. jour.neyed; jour.ney.ing; jour.neys;journey v.intr.To make a journey; travel.journey v.tr.To travel over or through.Middle English journei[ day, day's travel, journey ]fromOld French jorneefromVulgar Latin *diurn硉afromLate Latin diurnum[ day ]from neuter ofLatin diurnus[ of a day ]from di秙[ day ]*See Also : diaryjour搉eyer njourneyAHD:[j鹯搉禲D.J.:[6d/*8ni8]K.K.:[6d/)ni] n. pl. jour.neys; 【复数】 jour.neys;The act of traveling from one place to another; a trip. 旅行从一地旅行到另一地的行为；出行A distance to be traveled or the time required for a trip: 旅程行期旅行所经历的路程或所需的时间：a 2,000-mile journey to the Pacific; the three-day journey home.到太平洋的2，000英里路程；回家的三天行程A process or course likened to traveling; a passage: 历程，过程被比作旅行的过程或经历：the journey of life.生命的历程journey v. jour.neyed; jour.ney.ing; jour.neys;journey v.intr.To make a journey; travel.旅行，出游journey v.tr.To travel over or through.在……旅行或旅行到过……Middle English journei[ day, day's travel, journey ]中古英语 journei[ 一天，一天的行程，旅行 ]fromOld French jornee源自古法语 jorneefromVulgar Latin *diurn硉a源自俗拉丁语 *diurn硉afromLate Latin diurnum[ day ]源自后期拉丁语 diurnum[ 天 ]from neuter ofLatin diurnus[ of a day ]源自拉丁语 diurnus的中性词[ 一天的 ]from di秙[ day ]源自 di秙[ 天 ]*See Also : diary
今夕访古
很抱歉，我因为出差没有接到你的电话用英语表达为I'm sorry，But I missed your call because I was on a business trip。
读音为[aɪm] [ˈsɑːri] [bət; bʌt] [aɪ] [mɪst] [jʊr,jər] [kɔːl] [bɪˈkəz,bɪˈkɔːz] [aɪ] [wəz,wʌz] [ɑːn] [eɪ] [ˈbɪznəs] [trɪp]。
重点词汇解释：
1、sorry
adj. 遗憾的；对不起的，抱歉的
int. 对不起，抱歉
2、miss
n. 女士，小姐，年轻未婚女子
vt. 错过，想念，缺（勤）
3、trip
n. （尤指短程往返的）旅行；（赛跑等）赛程；（吸毒时经历的）幻觉；绊倒；错误；令人兴奋的经历；自我放纵的态度（或行动）；（机器、电路的）开关；（安全装置的）脱扣；轻捷的脚步；让人开心的奇人，奇妙有趣的经历
vi. 绊倒，跌倒；轻快地走（或跑、跳舞）；（非正式）（服用毒品后）产生幻觉；（部分电路）自动断开；作短途旅行
扩展资料：
sorry的用法：
sorry的基本意思是感到伤心，觉得难过，指因损失、创伤、不幸和烦恼等引发的或大或小的悲伤，往往夹有一种遗憾的感觉。若用以表示批评，往往含有怜悯、讥讽或关心的意味。
引申可表示对不起的，主要用于表示道歉和对自己所做的表示后悔。作此解时只能作表语。
sorry作对不起的解时，无比较级和最高级形式。
sorry后接不定式的一般式表示对正在做的或将来做的事表示难过或可惜，接动词不定式的完成式则表示对做过某事而感到难过或可惜。
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