【判断题】当螺栓断在孔内时,可用直径比螺纹大径小0.5〜 1mm的钻头钻去螺栓,再用丝锥攻出内螺纹。A. 对 B. 错
【判断题】严寒地区冰推力对护坡危害很大,用混凝土板做护坡,其垫层厚度要超过冰冻深度。( )
【判断题】文件操作中,文件打开方式和要打开的文件名都字符串。
【单选题】17 A company sublets part of its office accommodation. In the year ended 30 June 2005 cash received from tenants was $83,700. Details of rent in arrears and in advance at the beginning and end of the ...
【判断题】严寒地区冰推力对护坡危害很大,用混凝土板做护坡,其垫层厚度要小于冰冻深度。( )
【单选题】当螺栓断在孔内时,可用直径比螺丝小径 的钻头钻去螺栓,再用丝锥攻出内螺纹。
【判断题】当螺栓断在孔内时,可用直径比螺纹大径小5〜 1mm的钻头钻去螺栓,再用丝锥攻出内螺纹。A. 对 B. 错