问题
单项选择题
跳汰机技术要求中空载实测噪声应不超过()dB。
A、65
B、85
C、15
D、120
答案
参考答案:B
跳汰机技术要求中空载实测噪声应不超过()dB。
A、65
B、85
C、15
D、120
参考答案:B
阅读理解。 | ||||
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