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19 At 30 June 2004 a company’s allowance for receivables was $39,000. At 30 June 2005
trad
19 At 30 June 2004 a company’s allowance for receivables was $39,000. At 30 June 2005 trade receivables totalled $517,000. It was decided to write of
英语翻译"Iamsomuchmorepreparedtoreceiveandthankyourwordsofpraisenowat19thanIevercouldhavebeenat15,"mydaughterwrote,explaininghowgladshewas
英语
te,explaining
物体质量为m，在半径为r的圆轨道上做匀速圆周运动，周期为T，则物体的线速度大小是v=2πrT2πrTm/s，角速度ω=2πT2πTrad/s，向心力F=4mrπ2T24mrπ2T2N．
物理
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