【单选题】两台起重机吊运同一物体时,在不能保持每台起重机不超载和同步运行的情况下,每台起重机允许起重量应降低至原来的()。
【简答题】一种收音机每台售价今年比去年降低25%,今年每台售价36元,去年每台售价多少元?
【简答题】一种复读机原来每台售价292元,现在每台售价降低10%,现在每台复读机售价是多少元? (线段图---关系式-解答)
【单选题】The workers are repairing the windows _______ glasses were broken by strong wind last night. [ ]