Match the following designations with their functions: cts and breaks as quick as possible abnormal currents exceeding 10 in() tely makes or breaks an on-load circuit() cts current increase up to 10in and stops the starter before the temperture rise of the motor and conductor deteriorates the insulating materials () A. swiching B. protection against shotr-circuits C. isolation D. protection against overloads 第二部分 看图选择 给你一段ppt,然后回答四个问题 第三部分 英语写作 "if world without Communication Engineers"
Flat X, 88/FCentre PlazaHong Kong2 January 2001Mr Ho(Title)ABC LtdHarbour CityTsim Shat SuiKowloonDear Mr HoApplication for the position of BuyerThis ...