2022英语周报七下人教版答案

15.(共17分)(1)向上层清液中继续滴加BaCl2溶液,无白色沉淀生成,(2)AgNO3溶液(3)坩埚(4)40w233(7)b(8)迦侣(5)偏低(6)检查装置气密性abd×106525×10(9)偏高(10)否

High school exit tests have been cancelled in some states in America in recent years. (=R-)This is notsurprising because studies show they do little good to students.【高分句型一】(要点二) nstead of ensuring college readiness and academic success, they actually don't measure what should be measure.【高分句型二】(要点三) Therefore, exit test scores should only be one part of the standards of high school diplomas.(要点四)[60 words

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