题目

下列离子方程式中不正确的是           A．在氯化铝溶液中加入过量烧碱溶液：Al3++4OH－=AlO2－+2H2O    B．在硫酸铜溶液中加入过量氢氧化钡溶液：Ba2++SO42－=BaSO4↓    C．在澄清石灰水中通入过量二氧化碳：CO2+OH－=HCO3－    D．在碳酸氢钙溶液中加入过量苛性钾溶液：Ca2++HCO3－+OH－=CaCO3↓+H2O 答案：BD第二卷(非选择题)第三部分　写　　作 (满分30分)第一节　单词拼写 (每小题1分)根据所给汉语注释，写出所缺单词的正确形式(每空限写一词)。⒈ She works very hard, and she is a great _________(安慰) to her parents.⒉ It’s ______________ (不必要的) for you to have a talk with her.⒊ _____________ (雷雨) is common in summer.⒋ The girl enjoys singing and dancing, and she is _______ (敏锐) at music.⒌ He is the __________ (冠军) of the boys’ 200-meter race at the sports meet.⒍ He likes playing the piano a lot and wants to be a ______ (钢琴家) in the future.⒎ The boss is ____________ (乐观的) about his factory.⒏ Did you get seasick during the __________ (航海)?⒐ Please _______ (加热) the milk until it boils.⒑ Wool is one of the chief _________ (出口物) of Australia.