题目

下列反应属于化合反应的是（） A . 2Cu+O22CuO B . C+2CuO 2Cu+CO2↑ C . CaCO3 CaO+CO2↑ D . C2H5OH +3O2 2CO2+3H2O 答案：A— How many ______ can you see in the kitchen? — Four. A. bottles of juicesB. bottles of juice C. bottle of juicesD. bottle of juice