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游离醌类不易溶于下列哪种溶剂
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The sun shines because it is made of glowing gases. It gives off its own light. The moon shines too, but it doesn’t give off any light of its own. We can see the moon only because it reflects light from the sun. The moon travels around the earth about every twenty-nine days. During this time, the moon looks as if it changes size and shape. It seems to grow from a small part of a shining circle into a full circle. Then it becomes small again. The moon doesn’t really change. It is just because we see different parts of it lit up by the sun. The sun shines because it ______.
EDTA与金属离子的络合反应速度快，一般都能迅速完成。
【5】 的目的是检查模块是否正确的组合在一起，是否能够实现规格说明文档对产品功能的要求。
在财务管理中，证券投资与项目投资均属于投资，区别在于投资的对象不同。 ( )
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