How much do the respondents know about radiation?
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What is their attitude to nuclear power?
What is the major reason for their lack of correct understanding of radiation?
How can laypeople’s understanding of radiation be improved?
以下关于继承的叙述正确的是。
A. 在Java中类不允许多继承
B. 在Java中一个类只能实现一个接口
C. 在Java中一个类不能同时继承一个类和实现一个接口
D. 在Java中接口只允许单一继承
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