【名词&注释】
形容词(adjective)、聚氯乙烯塑料(polyvinyl chloride plastics)、聚乙烯塑料(polyethylene plastic)
[填空题]已知ABC的周长是24cm,三边a、B、c满足c+a=2b,c-a=4cm,求a、B、c的长.
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学习资料:
[单选题]不能用燃着的木条鉴别的一组物质是
A. 空气和氧气
B. 氮气和二氧化碳
C. 聚乙烯塑料和聚氯乙烯塑料
D. 羊毛和化纤布料
[单选题]_______________.
A. shines
B. drops
C. puts
D. fits
[单选题]14.
A. name
B. names
C. friend
D. friends
[单选题]13.
A. a
B. an
C. the
D. /
[单选题]27. Miss Gao isn’t here. She ____________ to the bus station to meet Mr. Browm
A. go
B. has gone
C. has been
D. would go
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