单项选择题
A.5—7cm B.6—8cm C.7—8cm D.8—9cm
A.0.2—0.3cm B.0.3—0.4cm C.0.4—0.5cm D.0.6—0.7cm
A.70cm*70cm B.70cm*90cm C.70cm*110cm D.90cm*110cm
A.100cm*155cm B.120cm*155cm C.110cm*120cm D.130cm*150cm
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