2. 外语
  3. The cost of heating your home, particularly during the colder winter months, makes up about 60% of energy bills. If you need a n

The cost of heating your home, particularly during the colder winter months, makes up about 60% of energy bills. If you need a n

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问题     The cost of heating your home, particularly during the colder winter months, makes up about 60% of energy bills. If you need a new boiler (锅炉), make sure you buy one of the best boiler brands.
    The first question you should ask yourself if you want the most energy efficient boiler is what type of boiler you should buy. All modern boilers that you can buy are condensing (冷凝式) boilers, which are much more efficient than traditional non-condensing boilers. According to a study, you could save as much as £ 340 a year on your gas bill if you’re trading in an old-style non-condensing boiler for a new condensing one.
    Getting the wrong type of boiler for your home results in unnecessarily high bills. Learn more about the different types of boiler and which would suit you best in our full guide to the different types of boiler.
    Once you’ve decided on the type of boiler you need, the next key question is the size. The size of the boiler in the context of efficiency is its heat output. The higher the heat output of the boiler, the more energy it will be using when it’s switched on. In most cases, larger homes with more radiators (散热器) and more bathrooms will need a larger heat output than smaller ones. Learn everything you need to know about picking the right size boiler for your home in our free guide on how to buy the best boiler.
If you want the most energy efficient boiler, you should first decide on________.
选项 A、the producer of a boiler
B、the price of a boiler
C、the type of a boiler
D、the size of a boiler
答案C
解析 信息明示题。由题干中的most energy efficient boiler和first定位到第二段第一句。定位句指出，如果你想要最节能的锅炉，应该确定的第一个问题是买什么类型的锅炉。比对信息可确定C)“锅炉的类型”为本题的答案。原文中未提及A)“锅炉的生产商”和B)“锅炉的价格”；D)“锅炉的大小”在原文最后一段虽有提及，但并非是节能首要考虑的问题，因此可以排除。
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