【简答题】The plane at about 9:35 a.m. despite the heavy fog.
【简答题】The Princess was followed by five or six ___________when she got off the plane at the Pittsburgh International Airport.
【单选题】流过发光二极管的电流不能过大,否则会烧坏管子,一般发光二极管的工作电流为 ,因此发光二极管在使用时必须串联一个 。 [填空(1)] [填空(2)]
【简答题】The Princess was followed by five ——————when she got off the plane at the Pittsburgh International Airport.
【判断题】最大工作电流IFM是指发光二极管长期正常工作所允许通过的最大正向电流,使用时不能超过此值,否则发光二极管将会烧坏。
【简答题】I’ll meet my grandma at the airport. She will get ___________ the plane at five this afternoon.
【单选题】发光二极管工作的时候,不能够直接接电源,而要串入合适的________,否则会导致损坏。
【简答题】The plane at about 9:35a.m , despite the heavy fog. ( take off )