单项选择题X 纠错
A.20mm B.30mm C.40mm D.50mm
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单项选择题
A.380~450mm B.400~450mm C.400~480mm D.450~480mm
A.350~400mm B.400~450mm C.400~480mm D.500~550mm
A.1:0.8:1.3:0.04 B.1:0.4:1.2:0.02 C.1:0.6:1.4:0.03 D.1:0.3:1.1:0.01
A.32.5级 B.40.0级 C.42.5级 D.52.5级
A.85% B.90% C.95% D.98%
A.10mm B.12mm C.13.5mm D.17mm
A.10号 B.6号 C.9号 D.17号
A.630mm B.630.7mm C.635mm D.635.5mm
A.a>b>c B.b>c>a C.c>b>a D.a>c>b
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