【名词&注释】
化学反应(chemical reaction)、可燃物(fuel)、为什么(why)、着火点(kindling point)、资源网(resource network)、一句话
[单选题]燃烧是人类最早利用的化学反应之一，人类已有几十万年的利用燃烧反应的历史。www.zk5u.com中考资源网(resource network)燃烧需要具备的条件是①可燃物②氧气或空气③温度达到着火点
A. ①②
B. ②③
C. ①③
D. ①②③
查看答案&解析
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举一反三：
[单选题]Howmuchdoestheticket______fromShanghaitoBeijing?
A. cost
B. took
C. spend
D. pay
[单选题]28． Mike-s room isn’t tidy(整洁) because ________．
A. something is broken
B. he can-t find his watch
C. he is an English boy
D. his things are everywhere
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