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【简答题】
Your company decides to invite all the specialists listed in the following chart to meet for a construction project. Your job is to write an invitation letter. Some parts have been done for you. Invitation Dear Sir/Madam, The Werkhart International is most pleased to 1 ____________you to participate in the 2____________ to be held on January 24,2009 in Tengda Building. The meeting aims to discuss a(n) 3_________________ project. Government officials, 4 __________________________, architects, civil engineers, 5_________________________ and 6_________________________ will attend the meeting. If you have any questions or concerns, please contact Kathy Jones at (010)78236666.
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举一反三
【简答题】三极管有_个区,_个PN结,,按导电类型可分为_型和_型两种
【简答题】三极管按导电类型可分为 ____ 型和 ____ 型。
【简答题】三极管有 3 个区, 2 个 PN 结,按导电类型可分为 型和 型两种。
【判断题】当机车没有正常进行断合操作时,受电弓极可能拉弧烧伤接触网设备。因此,应在电分相装置范围内(从图 1 支柱 C 到另一端支柱 C )详细检查承力索、接触线及吊弦有无烧伤痕迹,吊弦、承力索有无散股等异常情况。
A.
正确
B.
错误
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