Unveiling The Mysteries Of Constellation Astrology Your Guide To The Stars Ppt And In Night

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Dalbo

Unveiling The Mysteries Of Constellation Astrology Your Guide To The Stars Ppt And In Night

学习就像练武功,要一层一层往上练。 第一层:字母w的发音就是 [ˈdʌbljuː],音类似于“达不溜”,我们都这么读; 第二层:天呐喏,我读了这么多年竟然读错了,原来w读 [ˈdʌbl.juː],音为“double u”!中. W/w, w/v 都表示浓度。 浓度从底层上可以理解为两种物质的比例(就是通常概念下的溶质和溶剂) 后一个单位具体是w/v取决于行业习惯与实际需求,比如生产上配个50l 底物溶液,溶剂肯定是用称来取.

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