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listen say and 我们英语上就经常出现这个. listen and say it 听并且说出来 it是做say的宾语吗.但中文里面没有宾语喔. listen say and write listen, do and say什么意思 地暖的膨胀水箱计算公式是什么 水容量有没有计算公式 我想知道膨胀水箱的作用? 50公斤水离地3米高 水管接到地面 地面出水口压力多少? 我是做农业的,会用到18千瓦的抽水泵,18千瓦,出水口是3寸（7.5厘米的直径）的水管,压力不太清楚,反正18.5千瓦的机,3寸的管,大家应该知道它们的压力.我要做的是在它管里装个过虑网（要过虑 真空泵的出口压力一般是多少 我要获得空气真空度为10^4pa的真空泵,要如何选型?可以控制真空泵在达到这个压力时就自动停止工作吗? look,listen and chant 的意思? listen,chant and 英语翻译Spring,sweet spring is the time to begin.Plants begin flowering.Girls dance in a ring.Spring,sweet spring is a year's new thing.Kites fly in the sky.And pretty birds sing. If you listen to the rhythm of the pouring rain 意思If you listen to the rhythm of the pouring rain 的意思是什么?我问的是 意思 不是其他的。 10mm厚的钢管可以承受90公斤的压力吗?钢管内径340mm,外径360mm,走的介质是电厂磨煤机出来的煤粉,温度是200~300度,壁厚为10mm厚可以承受90KG的压力吗?另问一下磨煤机出口压力一般是多少压力呢? 为什么水烧开后会把水中的氧气赶出去,因为气体受热膨胀吗? 什么物质遇到水后者空气能够迅速膨胀 除了水以外还有哪些反膨胀物体? 下列物体受热膨胀性能最好的是A 空气 B 水 C铁块 read the following letter and fill in the blanks with proper relative pronouns or relative adverbsdear grandma,Thank you for the book 1._ you sent me.I am feeling better today.The doctor 2._ examined me said that I'm doing well.This hospital is a fun Fill in the blanks with proper words!1.Nothing ____ difficult in the world if you set your mind it.2.Nobody thought ____ would have to pay for ____ own ticket(s).3.I tird to find out whether everyone had brught ____ own texbook(s).4.Everything on exh Fill in the blanks with the proper words.1.The capital city of England is _________.2.The _______ flies the plane.3.The boys found a ______________ filled with golden coins!4.How do people __________ New Year in Scotland?5.In Ching Ming __________,pe fill in the blanks with the words in their proper forms.1.she told us the plan of her new project___.(brief)2.when he___his wonderful speech,we all stood up and clapped our hands.(conclusion)3.I am afraid you've made a wrong___.you'd better think it 地被类植物的种类有哪些? 米顿罗计量泵R系列的0－100%调节是什么意思?50%的意思就是50%的流量么? 植树种类最丰富的植被类型是什么A.草原B.热带雨林C.荒漠D.常绿阔叶林 米顿罗计量泵C726-368ti含义 如图所示,给试管里的水加热,水沸腾后,水蒸气推动活塞迅速冲出管口,水蒸气膨胀膨胀做功.那么工作物质水蒸气A 内能增加,温度升高,在试管口变成白色的热空气B 内能减少,温度降低,在试管口 给试管里的水加热,沸腾后,水蒸气推动活塞迅速冲出管口是试管里的水蒸气遇冷液化成小水珠还是空气中的水蒸气遇冷液化成小水珠? 为什么 如图,Fill in the blanks with the correct froms of the given words. Read the following notice and fill in the blanks with the correct words .noticewelcome to KELLY Supermarket today we are having a special sale if you need bread ,you can find it at our bakery section we have an amazing variety at invredible prices ev 甲和乙从东西两地同时出发,相向而行两地相距100千米,甲每小时走6千米,乙每小时走4.如果甲带的一只狗和甲同时出发,狗以每小时10千米的速度向乙奔去,遇到乙后即回头奔向甲,遇到甲又回头