单项选择题X 纠错
A.1 B.2 C.3 D.4
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单项选择题
A.9% B.10% C.12% D.15%
A.一个月 B.二个月 C.三个月 D.六个月
A.200t B.300t C.500t D.1000t
A.100t B.200t C.300t D.500t
A.可以 B.不宜 C.不应 D.严禁
A.0.06% B.0.1% C.0.6% D.1%
A.256mm B.298.6mm C.304mm D.358.4mm
A.15mm B.20mm C.25mm D.30mm
A.100mm B.120mm C.150mm D.200mm
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