2022八年级英语周报28期答案

19.(15分)1)2(1分),1(2Zn的价电子排布式为3d14s2,Cu的价电子排布式为3d04s,Cu失去一个电子内层达到饱和,再失去一个电子比较困难Z失去一个电子价层变为34,再失去一个电子比Cn容易,所以Cu的第二电离能大于Zn的第二电离能。(2分)考试编辑部公众号①乙醇分子间存在氢键(1分)1:6(2分)②sp3、sp2杂化(1分)①ABCu1或者CmAg(2分)②300(2分)③3×47c3 4pbi×100%。(2分3a

Possible version:Tom thought for a moment and was about to agree, but he changed his mind. " I can't, BenYou know Aunt Polly wants the fence to be perfect. It has to be done very carefully.I don'tthink you can do it well enough. "He said to Ben, who looked a little discouraged. "Oh, Tom, I'llbe careful. Please let me have a try I would like to give you my apple if you agree, "requestedBen In the end, Tom gave up the brush with unwillingness on his face, but joy in his heartWhile ben worked at the fence in the hot sun Tom sat under a tree, eating the apple, andlanning how to get more help. many of his other friends walked past him. Each one came topllaugh, but remained to whitewash the fence because they all got interested in it. One by one, theywhitewashed the fence, each giving Tom a reward, big or small. If he hadn't run out ofwhitewash, Tom would have owned everything belonging to his friends. He had a most wonderful andidle Saturday, sitting in the shade and enjoying the rewards that his friends gave him

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