题干

现已建成的核电站发电的能量来自于(       )

A:天然放射性元素放出的能量

B:人工放射性同位素放出的能量

C:重核裂变放出的能量

D:化学反应放出的能量

上一题 下一题 0.0难度 选择题 更新时间:2015-09-17 02:21:20

答案(点此获取答案解析)

C

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                                                                                                 小小的花,
                                                                                                 也想抬起头来,
                                                                                                 感谢春光的爱——
                                                                                                 然而深厚的恩慈,
                                                                                                 反使她终于沉默。
                                                                                                 母亲啊!
                                                                                                 你是那春光吗?