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????????? ??m ?v?????_????
...????????? ??m ?v??????????=1.0×103??/?3 ???????????????????????? ???????m?????V????? ??????? ??m/V ? ???????...
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????????? - ??
...??????? ?????????? ???????M14???????14mm??????M????????????????????????????+????+?????+???????+???? (????????????) ????????????????????4.8??8.8????? ......
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????G=mg G???? m?g??????_????
...????G=mg G???? m?g??????G??????????N??m??????????g???????????9.8N/kg ......
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???PLC I?Q? M? L? D??????_????
...???PLC ??????? I?Q?M?SM?V?L?S?C?T?????????????? I????????????????????? Q?????????????????? M??????????????????????? L??????????LD10????????????????? ......
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km/h?m/s?????_????
...????????V=S/t? ??????m/s?km/h? ?? (velocity) ????????????????????? ????? ?????? ???????????????????? ???????????/???/?? ??/????...
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????f?c?y?k?h?m?g?s?l?q?e?v????????_????
...f?c?y?k?h?m?g?s?l?1?e?v????????????????????????????????????????????????????????? ?????????????????????=F?????????=C?????????=Y????????????????? ......
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?A??????B,C,D,E,FG,H,J,K,L,M,N,O,P,Q,R,S,T,U,VW,X,Y,Z???????
...?A ????B ????C ????D ?????E ????F ????G ????H ????J ????K ????L ????M ???? ?N ????P ????Q ?????R ????S ????U ?? ????A?????????...
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?????GB? MB ? M ? KB ?K???????_????
...KB??K??MB??M??GB?????????????????????1KB=1024B?1MB=1024KB?1GB=1024MB? ???????????????????????????????????????????? ??? ??????????????????????????2???????????? ......
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?A??B??C??D??E??F??G??H??I??J??K??L??M??N??O??P??Q??R??S??T
...?G ???? ?H ??? ?J ??? ?K ??? ?L ??? ?M ??? ?N ??? ????? ????????????????????? ??? ????? ??????????????????????? ??????????????????????...
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