题目内容
行程开关是一种小电流的（）电器。
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行程开关的种类很多,按运动形式可分为直动式和转动式,按结构可分为( )三种
行程开关可用于机械运动的（）控制。
Directions: Make the sound judgment based on the text. If it is true, write “T”, If not, write “F”.It was not really necessary to go to Provence because he had already been there in his imagination.
Travelling abroad was just a nuisance so it would be better to stay at home and remain an armchair traveller.
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