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①时间单位:采用d、h、min、s而不用天、小时、分钟、秒。②关于分子量、原子量名称和符号。我国法定单位将“原子量”改为“相对原子质量”(符号为Ar),“分子量”改为“相对分子质量”(符号为Mr),不再用Dalton(D,道尔顿)或u,如分子量为64kD,应改为相对分子质量为64000或64×10
① time units: the use of d, h, min, s instead of days, hours, minutes, seconds. ② on the molecular weight, atomic weight names and symbols. China’s legal entity changed “atomic weight” to “relative atomic mass” (symbol Ar) and “molecular weight” to “relative molecular mass” (symbol Mr) instead of using Dalton (D, Dalton) or u, If the molecular weight of 64kD, should be changed to the relative molecular mass of 64000 or 64 × 10