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【多选题】
引线材料的性能要求（）。A.
电阻率低
B.
电阻温度系数小
C.
抗氧化性能好
D.
易于焊接
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举一反三
【简答题】口算． 7×30= 63÷3= 56-39= 14×4= 560÷8= 500×9= 400÷8= 13+37=
【单选题】The navigation systems in cars like Lexus, BMW and Audi are mentioned to show ______.
A.
the immaturity of the new technology
B.
the superiority of the global positioning system
C.
the cause of price fluctuations in car equipment
D.
the different ways of providing guidance to the driver
【简答题】什么是雪崩倍增效应？
【单选题】Cars are mentioned in Paragraph 2 to show ________.
A.
the Internet can provide maps to guide drivers in traffic jams
B.
people can solve air pollution and traffic jams by using the Internet
C.
the Internet, like cars, brings convenience and causes problems at the same time
D.
the negative effects they cause
【单选题】All of the following are mentioned in Paragraph 2 as contributing to how cars cause air pollution EXCEPT that______.
A.
the brakes on cars give off asbestos bad for health
B.
car combustion emits poisonous chemicals
C.
catalytic converters also produces poisonous chemicals
D.
tires give off small rubber particles harmful to health
【简答题】直接写出得数 3.05×1000= 125×8= 84+0÷16= 156-28-72= 9.1÷10= 56+= 900÷25÷4= 37+63×0=
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