下列物质吸收方式中，符合右图两种曲线的是（　　）

- It's too cold today. Would you mind ______ the window?

- Certainly not. Go ahead.

_______ plays an important part in winning the fight against the serious disease?    

某体育用品商场采购员要到厂家批发购进篮球和排球共100只，付款总额不得超过11815元，已知两种球厂家的批发价和商场的零售价如下表，试解答下列问题：

⑴该采购员最多可购进篮球多少只?
⑵若该商场把100只球全部以零售价售出，为使商场的利润不低于2590元，则采购员采购的方案有几种?