What does the passage mainly discuss? According to the passage, a flashbulb can be made to burn longer by using

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问题 What does the passage mainly discuss?
According to the passage, a flashbulb can be made to burn longer by using

选项 A、thicker wire
B、more oxygen
C、thinner glass
D、continuous electricity

答案A

解析

转载请注明原文地址:https://www.kaotiyun.com/show/ZbyO777K

托福（TOEFL）

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What does the passage mainly discuss? According to the passage, a flashbulb can be made to burn longer by using

托福（TOEFL）

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WhydomanyAmericansandEuropeansfailtospreadtheirfinancialriskswheninvesting?

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