沪粤版八年级物理知识点归纳总结

1(m)(km)(dm)(cm)(mm)(m)(nm)1km103m1dm101m1cm102m1mm103m1m106m1nm109m234567(1)(2)(3).1215m/s3.12..3a.HzHzb.c.41Hz1s100100Hz.2().3()()