根据括号里的单词提示，完成短文填空。

    Mr. Brown is a young and ____ (success) businessman. He ____ (live) in the countryside and he often drives his car to his office.

    One day, while Mr. Brown ____ (drive) down a street ____ the loud music on, he saw some children running around. Suddenly, a stone ____ (fly) to his car's door! He jumped ____ of the car and shouted to a girl, "That's my new car and it will ____ (cost) a lot of money to repair it!"

    "I'm sorry...I didn't know what else ____ (do)." The girl said.

    With tears in her eyes, the girl pointed to a boy lying on the ground. "It's my brother." She said. "He fell out of his wheelchair and I ____ (not lift) him up. He's too heavy for me. I just wanted to get your attention." After ____ (hear) her words, Mr. Brown lifted the boy back into the wheelchair.

      Mr. Brown keeps the dent (凹痕) to remind him not to go through life so fast, or someone will have to throw a stone at you to get your attention!

中国从古到今，政治制度和经济制度相辅相成。阅读下列材料，回答问题。

材料一：这位新皇帝开始将早先在本国取得辉煌成功的法家学说应用到全国。他废除了所有封建国家和王国，将广阔的国土划分为若干行政区，每一行政区都配备一批由中央任命，并向政府负责的官员。

——斯塔夫里阿诺斯《全球通史》

材料二：昔日龌龊不足夸，今朝放荡思无涯。

春风得意马蹄疾，一日看尽长安花。

-----孟郊《登科后》

天下英雄，入吾彀中矣。”

——唐太宗

材料三：北宋时期，国家财政收入的百分之八十左右来自淮河以南地区。淮南每年向都城汴京运送粮食六百万石，丝绸、茶叶等物品也源源不断地输送到京城。……南方地区经济持续发展，支撑了南宋半壁江山。

材料四：清朝……开放四个港口，作为对外通商口岸；并对出口的商品种类和出海船只的载重作出了严格的限制。（后）下令只开广州一处作为对外通商口岸，关闭了其他港口。

制作食品离不开调味品．

（1）“加碘盐”中含有碘酸钾（KIO₃），其中碘的化合价是　 ____．

（2）打开盛有米醋的瓶盖时，立刻就闻到了酸味，这是因为 ____．