问题
单项选择题
水工图纸中的尺寸标注，一般以（）为单位。
A.mm；
B.cm；
C.dm；
D.m。
答案
参考答案：B
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水工图纸中的尺寸标注，一般以（）为单位。
A.mm；
B.cm；
C.dm；
D.m。
参考答案：B
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