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互锁电路构成的原则是，将两台不允许同时工作的接触器的常闭触头串入对方线圈所在控制回路中。( )
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Am I Making Any Money 0 Most people and most businesses are in business to make a profit. At the CORRECT 00 simplest level, profit means making more money than you spend on. Many ON 34 confuse profit with income. As a result, they can’’t grasp it why all their income 35 isn’’t getting them ahead} why no one wants to invest in their high-sales 36 company; why the bank won’’t extend to their line of credit. Most people are very 37 good at tracking their income. When someone pays for you, that is income. 38 Income is usually related to production levels, but is not tied to it directly. You 39 may produce more or less than you sell. For instance, if you have already 100 40 widgets in the warehouse when you receive an order for 150, you only have to 41 produce out 50 additional widgets. If you make widgets for skis, you may make 42 20 widgets every month during the summer even though you don’’t sell any, just 43 so that you have enough in the warehouse when winter arrives. So income is 44 something when you actually get paid, not when you make the product you are 45 going to sell. Total income is just the total of all your payments received during the year. 45（）
电流继电器的返回系数小于1。( )
电梯额定速度大于1m/s时，通常选用瞬时式安全钳。( )
BKDl9系列矿用隔爆型真空馈电开关不具有电动机过载和短路保护功能。( )
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