問題詳情
二、非選題：
3.已知外太空有一星球每秒發射出的能量為4.5×1022焦耳，則該星球每秒減少的質量是【 （4） 】公斤。
3.已知外太空有一星球每秒發射出的能量為4.5×1022焦耳，則該星球每秒減少的質量是【 （4） 】公斤。
參考答案
答案：B
難度：適中0.58982
統計：A(38),B(197),C(58),D(8),E(0)
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