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

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

admin2005-01-30  15
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
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