试题与答案

目前,水冷壁常见的结构形式有()、膜式、销钉式等几种,在电站锅炉中应用最广泛的是膜式

题型:填空题

题目:

目前,水冷壁常见的结构形式有()、膜式、销钉式等几种,在电站锅炉中应用最广泛的是膜式水冷壁。

答案:

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参考答案:D

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The old man often fell asleep during the day in his chair. Then the monkey sat at the old man's side and

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B. the old man made the monkey do nothing

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C. From this story we can learn; sometimes things done out of harmful will may be harmful.

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