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1 #include2 void main(){3extern int b;4int a=17;5{int a=9; b-=a;}6printf("%d, %d\n", a, b);7 }8 int b=11;以下描述正确的是_____
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以下关于作用域的相关描述错误的是_____
Will you be a worker or a laborer?The text argues, by differentiating among work, labor, and play, that interest and __1_______ in work are important for the benefit of both _____2_____ and society.There are three major differences between workers and laborers. Firstly, workers and laborers are different in their ___3____ toward their work. Workers will dedicate more time to workingand spend less time on leisure,whereas laborers will regard leisure as ___4_______ from compulsion and the more hours they have free for play, the better. Secondly, workers and laborers differ in the amount of _______5____ they derive from their jobs. Workers will achieve greater ___6________ than laborers. Thirdly, in modern times, workers and laborers spend their leisure timein different ways.While social development has created much more leisure time than ever before, modern laborers spend their leisure time in fostering bad habits. Considering this phenomenon, _____7__________ can make the difference between being bored, unhappy laborers and workers who find meaning and joy in their _____8______ and life.Moreover, workers, unlike laborers, hurl their ___9______ into their work, be it physical or mental.Everyone has to find a job andearn a living, and that whateverjob you choose, you must ____10________ this essential question: Will you be a laborer or a worker?
我们在室外使用主动红外探测器时，对其作用距离影响最大的有哪些因素呢？
主动式红外探测器，由发射和接收两部分组成。工作原理：工作时收发机之间产生红外光束构成封锁线，无人穿越报警。
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