【名词&注释】
化学反应(chemical reaction)、可燃物(fuel)、着火点(kindling point)、资源网(resource network)
[单选题]( )
A. learn
B. learned
C. learning
D. learns
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学习资料:
[单选题]Tommisunderstoodhisclassatfirstbecause
A. hedidnotknowmuchaboutIndianculture
B. hedidn'texplaineverythingclearlyenough
C. somestudentsdidn'tunderstandhisquestions
D. hedidn'tknowwherethestudentscamefrom
[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
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