单项选择题
A.78-88℃ B.88-98℃ C.85-95℃ D.85-90℃
A.6 B.8 C.10 D.12
A.450-570W B.470-570W C.470-550W D.400-570W
A.30%；30% B.32%；32% C.35%；35% D.37%；37%
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