吊篮内人员应系好安全带,安全带挂钩应挂在吊钩上,不许挂在()上。手工具系好安全绳,工作面下方严禁人员滞留或通过。
参考答案:吊篮
The type of contract where the buyer incurs opportunity cost but little or no additional cost risk is called______.
A) fixed-price with incentive B) firm-fixed-price C) fixed-price with economic price adjustment D) fixed-price with right of renewal
现有下列物理量或单位,按下面的要求将其序号填入空中:A.质量; B.牛顿; C.米/秒;D.密度; E.焦耳; F.千克;G.厘米;H.秒;I.长度;J.时间.其中属于基本物理量的有______;在国际单位制中作为基本单位的有______.