a着有质量的衣服,找有质量的男朋友! Is having the quality clothes, looks has the quality boyfriend![translate] akeep sb. informed 保留sb。 消息灵通[translate] aIf you only use one shoulder to carry the bag,it couid hurt your spine. 如果您只使用一肩膀运载袋子,它couid伤害了您的脊椎。[transla...
某厂准备连续3个月生产 A种产品，每月初开始生产。A的生产成本费为 ，其中x是 A产品当月的生产数量。仓库存货成本费是每月每单位为1元。估计3个月的需求量分别为d1=100，d2=110，d3=120。现设开始时第一个月月初存货 =0，第三个月的月末存货 =0。每月的生产数量应是多少，才使总的生产和存货费用为最...
76. How kind of you it is to o___ me your help! 77. She didn’t give a r___ to my letter. 78. In order to protect our environment, we mustn’t t___ away so much waste. 79. A s___ line is the shortest distance between two points. 80. These goods are t...