单项选择题
A.8~8.5B.9~9.5C.9~11D.7~10
A.1.0~1.6B.1.2~1.6C.1.3~1.5D.1.3~1.7
A.210~220B.210~230C.215~235D.215~240
A.2.2~2.6B.2.3~3.0C.2.3~2.7D.2.2~3.0
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