单项选择题
A.2-4mm B.4-6mm C.6-8mm D.7-9mm
A.80°-110° B.80°-90° C.90°-120° D.100--130
A.70% B.80% C.100% D.110%
A.75℃ B.65℃ C.55℃ D.85℃
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