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黑水循环泵（激冷水泵）机封密封水使用的是（）

A.原水
B．热密封水
C．循环水
D．冷密封水
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相关考题

单项选择题
主切削平面与假定工作平面问的夹角是（），在基面中测量
A.前角
B．后角
C．主偏角
D．副偏角
未知题型
Passage 1: The cat sat down. Still looking at us in that disconcerting way, she tilted her head first to one side and then the other, inquiringly and cogitatively, the way a cat does when she has struck the unexpected and can’t quite make out what she had better do about it. Next she washed one side of her face, making such an awkward and unscientific job of it that almost anybody would have seen that she was either out of practice or didn"t know how. (From The Mysterious Stranger by Mark Twain) Passage 1 is an example of subjective description.
未知题型
“五位一体”总体布局是：经济建设、政治建设、文化建设、社会建设和生态文明建设（）
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