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(OH)2↓+ Ca2+ C．碳酸钙加入过量盐酸中：CO32 + 2H+＝CO2↑ + H2O －＋－D．钠和水反应：Na +H2O＝Na + OH + H2↑...

ecause of _____________(天气变化) and because people _________ (砍伐) trees and ______...

tch bored a lot of fans to death．发布时间：2017-03-19 a. being concerned b. be conc...