单项选择题
A.5~6度 B.6~7度 C.7~9度 D.9~12度
A.42.5~50.8 B.43.2~57.6 C.45.6~58.5 D.48~52
A.50.2V B.55.4V C.57.6V D.59.8V
A.100%；50% B.110%；60% C.115%，80% D.130%；100%
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