当蛋白质溶液处于某一PH状态下,所带正负电荷数相等,此时溶液的PH值称为该蛋白质的() A. 等电点
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【简答题】We can use those approaches for all circuits, but as they become structurally more complicated and involve more and more elements, this direct method soon becomes cumbersome. At this time we can use t...
【判断题】Aunt Sally is a traditional English game usually played in pub and fairgrounds in the 17th Century. We can use this idiom to express the meaning that someone becomes the target of public criticism.