单项选择题
Our team was ahead during the first half, but we _____ in the last ten minutes.
A.had lost B.would lose C.were losing D.lost
A.
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单项选择题
(2005年广东)下列反应离子方程式正确的是3+ +4OH— == AlO2— + 2H2O2 + H2O+ 2C6H5O—→2C6H5OH + CO32—3— + H+ == CO2↑+ H2O2+ + 2Br— + 2Cl2== Fe3+ + Br2 + 4Cl—
A.向氯化铝溶液中加入过量氢氧化钠溶液:Al
3+
B.向苯酚钠溶液中通入二氧化碳:CO
2
C.向小苏打溶液中加入醋酸溶液:HCO
3
—
D.向溴化亚铁溶液中通入过量氯气:Fe
2+
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单项选择题
(2005年辽宁卷) 下列反应不能发生的是 3 3COOH=(CH3COO)2Ca+H2O+CO2↑ 2 2SiO3+H2O 3 3 2+H2↑
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