Ihavebeenstudyinghereforfouryears,bynextsummerI________.
Sorrysir,wedon'thavewineorbeer.Weareonlylicensedtosell_______drinks.
Theassociationis________toraisingfundstohelptheblind.
Q表示产量,成本C(Q)=100+13Q，单价p，需求量Q(p)=800/P+3-2则工厂取得利润最大时的产量为_____
________(fail)severaltimes,theyneedsomeencouragement.
