题目

市售加碘盐是在食盐中加入一定量的碘酸钾（KIO3），KIO3中碘元素的化合价是（ ）           A．+5               B．﹣1              C．+3               D．+1 答案：【考点】有关元素化合价的计算．                                  【专题】化学式的计算．                                          【分析】根据在化合物中正负化合价代数和为零，结合碘酸钾的化学式进行解答本题．            【解答】解：钾元素显+1 Do you like Home with Kids (《家有儿女》)? It is very popular (受欢迎的) now. Many children like it. There are five people in the family. There is a sister and two brothers in their family. Their father is a film director (导演). He doesn’t often do housework. He is always happy. Their mother doesn’t go to work. She stays at home and does housework. And she loves her children very much, but she gets angry easily. Xiaoxue is their daughter(女儿). She is a good student. Big brother, Liu Xing, can always make others happy. He likes ball games. Little brother, Xiaoyu, is helpful. He likes playing computer games. This is a happy family. 阅读短文，判断正误（正确A，错误B）1.There are five people in the family.2.Father often does housework.3.Xiaoxue isn’t a good student.4.Liu Xing likes playing computer games.5.Their mother goes to work every day.