The instrument is being repaired by a friend of my father's.这句话为什么到过来说这是个什么句型?

英语翻译It is required that the instrument should be tested before it is actually used. piano is a kind of musical instrument 还是the piamo is a kind of instrument the instrument is being repaired by a friend of my father's 这句话中 有is 和being 不是就两个be动词? 英语翻译If the geometry of the instrument is perfect,then when the rotation axis is vertical the tansit axis will be horizontal and the line of sight will sweep out a vertical plane when the telescope is elevated or depressed We consider it that the instrument be adjusted each time it is used.从句中是不是省略了should能结合consider用法讲下吗? we consider__ the instrument should be adjusted each time it is used.A,that it necessary B,it necessary that.答案选择A,为啥B不对? 英语翻译The Autocal procedure is used to null insertion delay differences between the start and stop channels,and to reduce the differential nonlinearity of the analog interpolators.It may be done whenever the instrument is completely warmed up we consider ______the instrument should be adjusted each time it is used的答案 What is that instrument called? my favorite instrument is (the) piano.之中的这个括号（ the）用加吗?为什么 many parents think learning to play a musical instrument is the only这篇英语文章 为什么piano is a kind of musical instrument句中piano前不加the ____ of plastics,the instrument is light.(make）时态填空,请写明原因 英语翻译：这个乐器是他自己发明的.The instrument is ____ ____ invention. 英语翻译The opening bank will also add that Telex is the operative instrument and no future confirmation is required. instrument可数吗为什么可以说play an instrument?有play the instrument的说法吗 英语翻译The customer is responsible of the compatible of connection of the instrument with the process condition,whth the sealing joint regarding the flange and of the electric connection in compare with the technical data of the instrument. 英语翻译A child's first experience with playing an instrument should be by ear,without the distraction of printed music.