问题
选择题
_______ the production up by 60%,the company has had another excellent year. [ ]
A. For
B. As
C. Because
D. With
答案
答案：D
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_______ the production up by 60%,the company has had another excellent year. [ ]
A. For
B. As
C. Because
D. With
答案：D
，其中的一个可能反应是分裂成钡
和氪
两部分，放出3个中子，各个核和中子的质量如下：mU=390.313 9×10-27 kg，mn=1.674 9×10-27 kg，mBa=234.001 6×10-27 kg，mKr=152.604 7×10-27 kg。试写出核反应方程，求出反应中释放的核能。