【判断题】【消耗次数：1】
抱钻是指在黏性层土中挖槽，钻速过慢，切削下来的泥土难以从钻头及侧刀上甩开而附着在钻头及侧刀上。
①
正确
②
错误
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相关题目
【单选题】
在种植初始钻中先锋钻主要起什么作用？
①
增加钻头长度
②
用于修整牙槽嵴
③
标记植入点，预备皮质骨，以便更好的了解骨质情况
④
用于阻生牙拔除时、拔牙增隙
⑤
用于口腔科手术时,咬切(持)或修整牙槽骨及周边组织
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