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【判断题】
If we ask the class to listen and we ask the questions afterwards, we are helping them improve their listening skill indeed.()A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】898×9≈______ 403×6≈______．
【单选题】A clean environment can help the city bid for the Olympic, which __________ will promote its economic development. [ ]
A.
in nature
B.
in return
C.
in turn
D.
in fact
【简答题】口算． 82+258= 24×60= 840÷20= 860-403= 58×0= 320÷20= 22+508= 125-25×0= 420÷15= 25×6×4= 65-15×2+3= 75-6×（1+4）=
【单选题】. A clean environment can help the city bid for the Olympics, which ______ will promote its economic development.
A.
in time
B.
in turn
C.
in return
D.
in fact
【多选题】下列聚合物是共聚物( copolymer )的是
A.
氯乙烯-醋酸乙烯共聚物（Ethylene-vinyl acetate copolymer）
B.
聚己二酰己二胺（Polyamide -66，Nylon 66， PA-66）
C.
丁二烯苯乙烯（Polybutadiene-styrene ，PBS）
D.
丁苯橡胶（Polymerized styrene butadiene rubber ，SBR）
【单选题】A clean environment can help the city bid for the Olympics, which ________ will promote its economic development.
A.
innature
B.
inreturn
C.
inexchange
D.
infact
【单选题】尼龙610(Polyamide610,PA610)的学名( ),单体为( )
A.
聚癸二酰己二胺，癸二胺和己二酸
B.
聚对苯二甲酸乙二醇酯，乙二醇和对苯二甲酸
C.
聚癸二酰己二胺，己二胺和癸二酸
D.
聚己二酰癸二胺，己二酸和癸二胺
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