题目

-----Alice is the most hardworking girl in her class, isn’t she ?   -------Absolutely! She _______ hardworking.      A. couldn’t be more    B. is more    C. could be most    D. is most   答案：A  下列各组物质转化的设计，能够实现的是                                        CO2   KOH   H2SO4    A．CuO   H2O     Cu(OH)2  H2SO4   CuSO4        B．Fe  O2      Fe2O3 H2SO4    FeSO4 C Ba(OH)2        BaCl2       BaCO3            D．Mg         MgSO4        Mg(OH)2