单项选择题
A.0.7 B.0.8 C.0.9 D.1.0
A.3.6M×4.8M B.4.2M×4.8M C.3.6M×4.2M D.4.2M×6.0M
A.7%~15% B.9%~15% C.9%~17% D.10%~17%
A.2~2.2 B.2~2.5 C.2.5~2.8 D.2.5~3.5
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