ppm和mgl

五环电阻的前四环一样,误差值环不一样可以带换吗? 举例说明四环五环电阻的表示方法 英语翻译我的爸爸,我的爸爸是一名教师,今年39岁,他是一个好爸爸,我爸爸有一双小眼睛,小耳朵和小嘴吧.一张圆圆的脸,胖胖的身材,看样子也想不出他是一名体育教师.我爸爸是一个工作认真, 英语翻译My father was a foreman of a sugar-cane plantation in Rio Piedras,Puerto Rico.My first job was to drive the oxen that ploughed the cane fields.I would walk behind an ox,guiding him with a broomstick.For $ 1 a day,I worked eight hours stra 英语翻译 I shook hands with my father in the truck,and for a long time he looked straight ahead and didn't say a word.But I knew he was going to say a little to me."I can't tell anything," he finally said."I never went to college,and none of yo …之父 的英文怎么说 是father of 还是 the father of 我想知道有关太阳的知识 发现化石 谁能帮我解决下 到底是什么动物? the tears fall over my face. fall down落下,为从……落下的意思时,必须加from吗,很多地方都看到tears fall down my face, 含有碳氢氧氮四种元素的无机物 有碳氢氧三种元素组成的物质 电磁炉的电阻是红红黑金 阻值是多少啊 为什么地球上氢氧氮碳硅铁那么多,其他元素很少据说最开始只有氢,其他元素的形成是恒星内部聚合反应,氢气合成氦气,氦气合成什么什么……总而言之就是小分子合成大分子,所以小分子很 Can't read my,can't read my No he can't read my poker face Can't read my No he can't read my poker face 铝锅遇碱变黑是怎么回事?电饭锅放了点碱就变黑了,是怎么回事. Can't read my,Can'tread my,no he can't read my poker face. LADY GAGA 的《 POKER FACE》Can't read my No he can't read my Poker Face .这一段怎么唱 No he can't read my poker face这句是哪里的听得很熟悉 谁有翻译 不要机器的翻译大神们帮帮忙 五环电阻的第四环是金色,应该怎么理解如：棕黑棕金白,怎么理解此电阻. 分液与萃取有什么分别 化学萃取的用具,方法,注意事项分别是什么? 我有个电阻不知道怎么看 第一环蓝色 第二环灰色 第三环银色 第四环金色 第五环绿色 谁帮我看一下 没看错 电阻开路了 量不出来 Manchester United 怎么读? Manchester united怎么读 John left the United States in 1969 to work in Africa.Africa was hot,andJohn left the United States in 1969 to work in Africa.Africa was hot,and when John came back to the United States in 1979,he said to himself,“ It’s much colder here than it w 什么是碱性水解反应卤化物碱性水解反应活性顺序.是否还有酸性水解反应.有酸性水解反应的话，酸和碱有什么区别。 下列酯发生碱性水解反应速率最大的是( ),为什么? 关于太阳的知识 简述我国第四纪地层特征.没搜到 希望懂的人告诉一下 关于太阳的一些知识.