单项选择题
A.275~265mm B.275~255mm C.275~250mm D.275~260mm
A.4~15吨 B.3~15吨 C.5~15吨 D.4~12吨
A.30℃和45℃ B.50℃和55℃ C.30℃和55℃ D.65℃和45℃
A.2/1和2/2 B.1/1、2/1和2/2 C.1/1和2/1 D.1/1和2/2
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