___lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical______lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical

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___lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical______lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical

___lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical______lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical
___lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical
______lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical

___lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical______lights are very useful in our daily life.A) Electric B) Electronic C) Electricity D.Electrical
答案是（D） electric 电的；导电的 electic power 电源
electronic 电子的 electricity n.电流
electrical 电的 ；与电有关的 electrical apparatus 电器

D

B) Electronic

A

A

答案应该是：A
B － 是电子
C － 电（流）或电气， 本身也是名词 <--这里也不合适， 有更合适的形容词。
关键是A和D的区别。 一般认为electric是指某样东西（设备，器件等）是用电的；而electrical是和电流或电气有关的， 比如： electrical engineering（电气工程）, electrical technology（电气技术）等。 因此...

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答案应该是：A
B － 是电子
C － 电（流）或电气， 本身也是名词 <--这里也不合适， 有更合适的形容词。
关键是A和D的区别。 一般认为electric是指某样东西（设备，器件等）是用电的；而electrical是和电流或电气有关的， 比如： electrical engineering（电气工程）, electrical technology（电气技术）等。 因此A更合适。
但是， 这道题出的有问题。 因此Electrical和Electric在形式上是可以互换的。 一般-ic和-ical的词义不同， 但偏偏electrical和electric是可以互换的， 因此如果宽松地讲，A和D都可以。
btw， “An electric light is a device that produces light by the flow of electric current.” 不讲electrical light.

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