牙槽嵴修整术适宜时间应在拔牙后 ["A.2~3周 ","B.4~5周 ","C.6~7周 ","D.7~8周 ","E.8~12周"]
在计算实砌墙身时,应扣除单个面积在()以上的孔洞所占的体积。 ["A、0.1m2","B、0.3m2","C、0.5m2","D、1.0m2"]
酸雨对下列物质的腐蚀作用最强的是()。 ["铜制塑像","大理石雕刻","水泥路面","铝制窗框"]
舌系带矫正术的方法为 ["A."Z"形移位瓣 ","B.黏膜游离移植 ","C.呈三角形切除 ","D.口底黏膜转瓣延长术 ","E.横行切断纵行缝合"]
大气污染物中,具有较强的致癌作用的是()。 ["二氧化硫","一氧化碳","臭氧","一苯并芘"]
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