问题
单项选择题
核电厂运行前环境辐射水平调查范围（以核电厂为中心）（）。
A、环境r辐射水平80km、环境介质中放射性核素比活度20km半径
B、环境r辐射水平50km、环境介质中放射性核素比活度10km半径
C、环境r辐射水平60km、环境介质中放射性核素比活度10km半径
D、环境r辐射水平50km、环境介质中放射性核素比活度30km半径
答案
参考答案：B
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核电厂运行前环境辐射水平调查范围（以核电厂为中心）（）。
A、环境r辐射水平80km、环境介质中放射性核素比活度20km半径
B、环境r辐射水平50km、环境介质中放射性核素比活度10km半径
C、环境r辐射水平60km、环境介质中放射性核素比活度10km半径
D、环境r辐射水平50km、环境介质中放射性核素比活度30km半径
参考答案：B
通读下面短文，掌握其大意，然后在各题所给的四个选项(A、B、C和D)中选出一个最佳选项。  With that, he thanked me happily and started off on his bike. I 44 heard him singing as he rode away. I got a warm 45 inside. I now understand what it 46 by the saying “Giving is getting”.47 it was only a little action, I got and learned more in those two minutes than I did in the rest of the month. Everyone in the world 48 help. Everyone can give help and everyone can be helped. The look of that man’s happiness appears in my mind 49 I have the chance to do something nice. This is the power（力量）of 50 .
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