已知仪表电源24V,输出功率32W,求其输出电流。
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过热蒸汽的质量流量M=100 t/h,选用的管道内径D=200mm。若蒸汽的密度ρ=38kg/m3,则蒸汽在管道内的平均流速为多少?
This part is to test your ability to do practical writing. You are required to write a poster according to the following instructions given in Chinese.
请为宏达超市写一张海报。内容是:夏季清仓货物处理,所有货物折价20%销售,售后不退不换。