After shoppers have one item ____ their trolley,other items follow more easily.

某送电线路架线后，用档端角度法检查一档导线弛度，因三线平衡，故只检查中间导线，测得数据为：a=19．2m，l=...

未知题型某送电线路架线后，用档端角度法检查一档导线弛度，因三线平衡，故只检查中间导线，测得数据为：a=19．2m，l=347m，θ1=3°38′；θ2=3°12′，检查时气温为±10℃，求中间导线弛度是否符合质量标准（气温为+10℃时的标准弛度为f=9.030m）？

这些力工若要具备起重和脚手架搭设作业资格，应该进行哪些工作？

未知题型这些力工若要具备起重和脚手架搭设作业资格，应该进行哪些工作？

Big brand names and items like precooked meals are very...

未知题型Big brand names and items like precooked meals are very profitable, so they are often clearly displayed to get the customer’s attention.