1. In the heating system, air used in the combustion of fuel such as natural gas, propane or oil can be preheated by use of a heat exchanger and passing of flue gas through a heat exchanger to preheat the air. This method can also be used for dryers and ovens to reheat the air ...
B1. We are determined to ___ the cost of heating and air-conditioning. A. repeat B. reduce C. notice D. remind 相关知识点: 试题来源: 解析 答案见上1.【B]句意是“我们下决心减少供暖和空调的费用”,“减少”是reduce。 反馈 收藏
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The heating and air conditioning systems in hybrid passenger cars are partially powered by energy from the battery. The more intensively they are used, the higher the energy consumption will be and the lower the electric range. On vehicles powered by a conventional internal combustion engine, the...
百度试题 结果1 题目heating and air conditioning 冷暖空调正确错误 相关知识点: 试题来源: 解析 正确 反馈 收藏