某品牌汽车经过两次连续的调价，先降价10%，后又提价10%，原价10万元的汽车，现售价____ 万元．

晶体（H₂C₂O₄•2H₂O）熔点较低，加热会熔化、气化和分解．草酸（H₂C₂O₄）受热会分解，它与氢氧化钙的反应为：H₂C₂O₄+Ca（OH）₂═CaC₂O₄↓（白色）+2H₂O．

甲、乙两同学对草酸受热分解的产物作如下探究：

    Hello, boys and girls. Welcome to this place. This is a f____ station. It's big. We can see some fire engines. They are r____. How many fire engines? Let me count. One, two, three…Ten are new, a ____two are old. The man is a f____. He's Jill's father. He's Mr Black. He's a t ____man. He likes helping people. He likes his job.