本题目来源于试卷: Nuclear & Quantum Physics E.4 Nuclear Fission，类别为 IB物理学
[单选题]
In the design of a nuclear fission reactor, which of the following stlp--* gbcyh /6 i/hco4rvcc 99m1olvpatementf,oiw8xfg6 :f s are tru, 6i8wfo:xgff e?
I. Control rods can increase the rate of fission when inserted into the reactor
II. The moderator blocks neutrons to ensure the chain reaction is controlled
III. Enrichment of uranium increases the probability of a chain reaction taking place
A. $I$ and $III$ only
B. $II$ and $III$ only
C. $I$ and $II$ only
D. $III$ only
参考答案: D
本题详细解析:
Explanation: I. is incorrect because control rods block neutrons and inhibit the rate of reaction II. is incorrect because the moderator slows neutrons to increase the chance of being absorbed by a uranium nucleus and result in a fission. III. is correct
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