题目

The China Daily newspaper group is looking for English-language senior business editors, senior copy editors, copy editors and graphic designers to strengthen its international learn. We offer a competitive salary package,free accommodation with utilities paid for,90 per cent medical reimbursement,a seven-day paid leave,eleven­day public holidays and a return ticket to the country of residence.Senior Business EditorYou must: assist the business editor in setting goals and working on achieving them; be an excellent team person who can generate ideas and think creatively and be able to rewrite 25℃时向pH=1的H2SO4溶液中加入铜片不发生反应。若再加入某种物质或改变条件,在一段时间内溶液呈现蓝色。则加入的物质或改变的条件一定不是(    )A.加入NaNO3固体B.加入Fe2(SO4)3固体C.将铜片接直流电正极,石墨接直流电负极,将两电极一同插入pH=1的H2SO4溶液D.将铜片与锌片用导线连接再插入pH=1的H2SO4溶液
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