我国具有悠久的历史文明，下列古代文化遗迹与化学变化有密切关系的是
A．制造青铜器皿
B．用泥土筑墙
C．磨制玉石饰品
D．在甲骨上刻字
答案：A
考点：
专题：结合课本知识的信息．
分析：化学变化是指有新物质生成的变化．物理变化是指没有新物质生成的变化．化学变化和物理变化的本质区别是否有新物质生成．
解答：解：A、铸造青铜器皿的过程中需要从铜矿石中冶炼铜，过程中有新物质生成，属于化学变化．
B、用泥土筑城墙的过程中没有新物质生成，属于物理变化．
C、磨制玉石饰品的过程中没有新物质生成，属于物理变化．
D、在甲骨上刻字的过程中没有新物质生成，属于物理变化．
故选A．
点评：解答本题的关键是正确分析变化过程中是否有新物质生成，如果有新物质生成就属于化学变化．
Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.
Martin Pearcey, 11, is one of the lucky ones: he could have been 42 in one eye. Like hundreds of others on November 5（Guy Fawkes’s Night）, Martin went to his 43 park to see the fireworks display. He was with his brothers, John and Dave. “A gang of kids had taken the 44 material out of several fireworks and had put it in a pile on the ground,” remembers John. “When they lit it, it went off and 45 Martin in his eye.” John 46 Martin to their grandmother’s house nearby, where the eye was immediately bathed in cold water. He was then taken to hospital, where a sterilized（消毒的） patch was put over it. “At first he couldn’t see a thing because the eye was so swollen(肿胀的),” says Martin’s elder sister, Pat. “It was weeks before it would open 47 again.” His dad agrees. “He was lucky not to lose the sight of that eye.” “Little kids shouldn’t be able to get hold of fireworks,” adds Pat. “I think organized 48 are much safer.” And young Martin now says, “I don’t mind fireworks when grown – ups are 49 , but I don’t like it when little kids have them. I think fireworks are a bit stupid, really.” |