While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.


While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.

Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.

It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.

The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.

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题目分析：
本题较长，结构和从句都较多，需要大家耐心把句子看懂。

选项分析：

A选项：本选项中第一个it是一个形式主语，指代身后的不定式短语to run nuclear plants，还原为正常语序则有：
to run nuclear plants costs about the same as other types of power plants. 
在逻辑上，costs about the same as other types of power plants的主语不能是不定式短语，而应该是名词短语，即，
Running  nuclear plants costs about the same as other types of power plants
其考查了“不定式和ing的区别”。用之于本题，显然是在讨论运营核电站这件客观事实需要花费多少，而不是主观的某个人或团体运营核电站的情况，因此应该用ing短语。
另外，定语从句that makes it more expensive for them to generate electricity的身前都是复数名词，所以其没有合理的修饰对象。
最后请注意一个没有错误的地方。状语从句the cost of running nuclear plants is about the same as for other types of power plants中的比较对象是没有任何问题的。这是一个省略现象，补全则有：
the cost of running nuclear plants is about the same as the cost for other types of power plants.
这里的for基本上代替了of running，不直接用of是因为running也省略了。如果直接是of的话，会被认为是其它核电站的成本，而非运营成本。

B选项：Correct. 本选项在语法和逻辑上均是正确的。

C选项：to run nuclear plants 错误同(A)；makes错误同(A)。

D选项：to run nuclear plants 错误同(A)；另外，本选项中stemming from the fixed costs of building nuclear plants是the electricity they generate is more expensive的伴随状语（根据状语的就近修饰原则），所以stem的逻辑主语是the electricity，这是不正确的。在逻辑上，源自于建造核电站的固定成本的（stem from  the fixed costs of building nuclear plants ）应该是“电能更贵”这件事，而不是电能（the electricity）本身。

E选项：比较对象不对等。在逻辑上具有same关系的应该是“运营核电站的成本”和“运营其它类型电站的成本”，因此应该用The cost of running nuclear plants is about the same as that of other types of power plants。

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