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【判断题】
s7-200 CPU226 PLC具有6个完全一样的高速计数器。A.
正确
B.
错误
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【简答题】防爆泄压装置包括____、____、防爆门和放空管等。
【简答题】We are going to see the ruins of Machu Picchu in the mountains of the Andes．Machu Picchu was forgotten for centuries but discovered in 1911 by Hiram Bingham, a professor from Yale．It is said to be one...
【简答题】Machu Picchu está en________.
【简答题】Machu Picchu is considered to be a truly extraordinary archaeological(考古学的) discovery and is one of South America’s largest tourist sites. As many as one thousand visitors visit the ancient Incan（印加文化...
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