正确答案: B
has to stand inoperative
题目:If the engine () for a long period, there will be a danger of frost.
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学习资料的答案和解析:
[单选题]废气锅炉烟道温度在1100℃以上时可能发生()。
铸铁着火
[单选题]应保持锅炉管表面边界层的废气温度()烟灰着火温度,减少烟垢着火的危险。Ⅰ.低于;Ⅱ.等于;Ⅲ.高于
仅Ⅰ对
[单选题]() the engines, the diesel engine is() used engine on board.
Among;the most commonly
[单选题]Since the engine doesn’t work well, you’d better () as soon as possible.
all the above