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According to this passage, we can not infer that .


A、 the water in the pipe has very high pressure
B、 steam that meets the cool water surface will condense
C、 the bend or a closed valve will prevent the water from moving
D、 it is necessary to drain the water in the piping when admitting the steam

发布时间:2025-10-21 00:07:26
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答案:A
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