问题
问答题
小明在用电压表测一节新干电池电压时，测出的电压值只有1.3V，其误差原因是什么？
答案
小明用电压表前没有把指针调到零刻度线上，不加电压时，电压表的指针指在了零刻度线的左侧，其测量值比实际值偏小．
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小明在用电压表测一节新干电池电压时，测出的电压值只有1.3V，其误差原因是什么？
小明用电压表前没有把指针调到零刻度线上，不加电压时，电压表的指针指在了零刻度线的左侧，其测量值比实际值偏小．
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| Don't waste precious (宝贵的) time because time __1__ will never return. Time passes very quickly. Some students __2__ they do not have enough time __3__ prepare all their lessons. That's because they do not know __4__ make sure of their time; __5__ they waste it in doing some useless things. Why do men work? Why do they study? Why do we go to school __6__ in the morning? What do trains run so fast? Why do __7__ people prefer taking buses instead of __8__? The __9__ is very simple: we wish to save time because time is precious. Remember that time is more valuable than money. | ||||
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