题目

工业中以铝土矿(主要成分为AI2 O3 , 另含有Fe2O3和SiO2)为原料冶炼铝过程如图所示. 试回答下列问题: (1) 实验室里过滤用到的玻璃仪器有烧杯、、. (2) 操作Ⅱ中生成不溶物C的离子方程式是. (3) 氧化铝的熔点高达205℃,工业上为降低能耗,在铝的电解冶炼时,采取的措施是. (4) 电解冶炼铝时,阳极和阴极以碳素材料制成,电解过程中,阳极材料需定期进行更换,原因是. (5) 为了提高综合经济效益,认真阅读下面活动海报的内容,并完成任务,在相应的横线上填写正确的内容。【1】Youth Explore has prepared you with a winter program for _________ days.【2】Two members and one non-member join in the program, they will pay _________ $.【3】Free lunches are not provided in the program because of personal food _________.【4】Program B start on _________ if there is a snow storm on 20th February.【5】I would like to join because ____________________________________________.
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