A：Yes, take it easy
B：Well, it just depends.
C：Ok, just in case
D：All right, you’re welcome
下列各项史料中，能够反映南宋都城临安面貌的是（ ）
用0.2mol/L Na2SO3溶液32mL，还原含2×10﹣3mol X2O72﹣的溶液，过量的Na2SO3用0.1mol/L KMnO4酸性溶液氧化（其中KMnO4被还原成Mn2+），共消耗KMnO4溶液1.6mL，则元素X在还原产物中的化合价是（ ）
Tom was so careless that he his right arm when he was riding to school
yesterday．
0.6:1.8的最简整数比是____：____比值是____
