故答案选C。 注意“produces”为“The central heating _ produces warm air”的谓语动词,所以缺少部分是构成主语的一部分,分析句意可得出答案。 反馈 收藏
Aquaheat Services is a friendly, local Thatcham-based boiler repair company offering highly-experienced, trusted diagnostic, servicing and installation services in Reading, the Thames Valley and London.
The central heating had been___and the room was as cold as ice. (关上) 相关知识点: 试题来源: 解析 答案:turned off.要翻译的部分为"关上",作谓语,所以用动词短语turn off,表示"被关上",所以用被动语态,前面有had been,所以用过去分词,故填turned off。反馈 ...
5第二篇 Home Heating Central heating became popular only after the Civil War. Typically, coal―burning furnaces(火炉)fueled the early systems.Natural gas had developed into the leading fuel by 1960.Its acceptance resulted in part from its wide uses.Because it comes primarily from U.S.and Canad...
Noun1.central heating- a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiators heating plant,heating system,heating,heat- utility to warm a building; "the heating system wasn't working"; "they have radiant heating...
the central heatingKIELICH JERZYKIELICH ADAMANDRZEJEWSKI ANDRZEJKIELICH CZESLAWKIELICH JOZEFKIELICH ZBIGNIEW
A central heating and/or hot-water production installation of the type using at least one source of conventional energy of the liquid or gaseous fuel kind and at least one heat pump thermodynamic heat source particularly of the compression heat cycle kind. In this installation the evaporator(s)...
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The results of an assessment of these flats showed that the installation of central heating was a desirable component of any solution... T Rose,WJ Batty,SD Probert - 《Applied Energy》 被引量: 2发表: 1989年 Living Standards of Older People before and during the recession in the North and...
Of course I could still choose to use the old thermostat with the new central heating unit. But using a simple on/off control device would greatly reduce the efficiency of the system compared to a modulating thermostat. Another issue was that the old thermostat was powered from the boiler and...