题目

便利店老板从厂家购进A、B两种香醋，A种香醋每瓶进价为5元，B种香醋每瓶进价为6元，共购进70瓶，花了390元，且该店A种香醋售价7元，B种香醋售价9元．（1）该店购进A、B两种香醋各多少瓶？（2）将购进的70瓶香醋全部售完可获利多少元？（3）老板计划再以原来的进价购进A、B两种香醋共150瓶，且投资不超过850元，仍以原来的售价将这150瓶香醋售完，且确保获利不少于398元，请问有哪几种购货方案？ 单词拼写和语法填空阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。Many Chinese believe ___【1】__ (eat) pig brains will increase their intelligence and some Americans regularly eat __【2】___ (cook) eggs to keep their minds sharp. __【3】___, doctors don’t recommend people to eat __【4】__ raw eggs or animal brains.Then, what food is good for your brain? Scientists have found __【5】__ relationship ___【6】___ diet and a healthy brain. Generally speaking, fish is a brain food. Besides fish, you should introduce lots of dark green leafy __【7】___ (vegetable) and colorful fruits into your diet, ___【8】___ most people lack the special vitamins these brain foods provide. If you eat brain foods ___【9】___ (regular), they can increase brain power ---- help you pay attention, keep you motivated, improve your memory and _【10】__ (less) stress from studies. Then you can do much better in your test.