本题目来源于试卷: Physics Unit31: Nuclear Energy and Radiation，类别为 通用国际物理
[单选题]
What is the meaning of the bh*qw/7fz b(r5zpr534c 7 fdrd zz hm:ter- ws p j.w)i8)94vs4jy jee (tpqwho-cgc5n;nm "critical mass"?
A. This refers to the mass of the "critical" elements in a reactor, i.e., the uranium or plutonium.
B. This refers to the minimum amount of fissionable material required to sustain a chain reaction.
C. This is the amount of mass needed to make a power reactor economically feasible.
D. This is the material which is just on the verge of becoming radioactive.
参考答案: B
本题详细解析:
暂无
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