What does the passage mainly discuss? [br] According to the passage, the white c

游客2024-01-05  26

问题 What does the passage mainly discuss? [br] According to the passage, the white color of the smoke particles generated by a flashbulb contributes to

选项 A、rapid cooling
B、bright illumination
C、electrical conductivity
D、intense heat

答案 B

解析
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