2022年上海市中考真题精品解析(word版)(解析版)
【中小学教辅资源店微信:mlxt2022】2022年上海市中考真题精品解析(word版)化学部分相对原子质量:H-1C-12N-14O-16Na-23Ca-40五、选择题(本大题共17题,共20分)21~34每题只有1个正确选项,每题1分,共14分。21.室温时某中性溶液的pH为()A.1B.3C.7D.10【答案】C【解析】A、pH-1的溶液显酸性,不合题意;B、pH-3的溶液显酸性,不合题意;C、pH-7的溶液呈中性,符合题意;D、pH-10的溶液呈碱性,不合题意。故选:C。22.磷肥为植物生长提供的主要营养元素是()A.NB.PC.KD.Na【答案】B【解析】只含有氮、磷、钾这三种营养元...
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