题目

A few days after the interview, I received a letter_________me admission to the university.       A．offering               B．offered                C．having offered        D．to be offered 答案：A蛋白质、糖类、脂肪三类营养物质对人体具有的共同作用是（   ） ①构成细胞的重要材料                                ②为生命活动提供能量 ③调节人体生命活动的物质                           ④储备能量 A．①②                   B．①③                    C．②④                      D．②③