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【多选题】
When we try to illustrate an idea, using examples can make our points clearer and easier to understand. Remember that the examples we use should be relevant and to the point. We can raise examples in the following ways. They are ________.
A.
Let me give you an example...
B.
Here's an example of...
C.
A good case in point is...
D.
To illustrate the idea, we can look at the example of ...
E.
As is shown in the example of...
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参考答案:
举一反三
【判断题】正常运行的管道,突然关阀会造成管内产生增压波。因此,关阀的速度越慢越好。
A.
正确
B.
错误
【简答题】898×9≈______ 403×6≈______.
【简答题】进制转化:403 (6)= ______ (8) .
【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】169×28≈______ 403×18≈______.
【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)=
【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 ________ the Olympics, which in turn will promote its economic development. [     ]
A.
wish for
B.
long for
C.
bid for
D.
stand for
【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
【多选题】下列聚合物中结构单元(Structural unit)、重复结构单元(Structural repeating unit)、单体单元(Monomer unit)相同的是
A.
聚乙烯(polyethylene,PE)
B.
聚氯乙烯(Polyvinyl chloride,PVC)
C.
聚己二酰己二胺(Polyamide 66,PA66)
D.
聚甲基丙烯酸甲酯(Polymethyl methacrylate,PMMA)
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