车削具有圆度误差的毛坯时,由于"误差复映"而使工件产生与毛坯同样大小的圆度误差。
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自动扶梯倾斜角大于30度,但不大于35度时,速度应不超过_M/S自动人行道速度应不超过_/S
()means an observed situation where objective evidence indicates the non-fulfillment of a specified requirement.
A. Conformity
B. Non-conformity
C. Observation
D. Major non-conformity
根据《建筑工程建筑面积计算规范》(GB/T50353--2005)规定,下列工程量计算正确的是()。
A. 多层建筑物首层应按其外墙结构外围水平面积计算
B. 二层及以上楼层应按其外墙勒脚以上结构外围水平面积计算
C. 层高在2.50m者应计算全面积
D. 层高在2.30m者应计算1/2面积
A man aboard a vessel,signaling by raising and lowering his outstretched arms to each side,is indicating().
A. danger,stay away
B. all is clear,it is safe to pass
C. the vessel is anchored
D. a distress signal