题目

—_______ John this week? —Yes. —Where _______ him? —In the library. A．Did you see; did you see                        B．Have you seen; did you see C．Do you see; have you seen                      D．Have you seen; have you seen 答案：.B 解析: “你本周见John了吗”？强调对现在造成的影响，用现在完成时；“在哪儿见的”强调的为过去的事实，用一般过去时。故选B。下列关于高尔基体的叙述，错误的是 A．高尔基体膜具有流动性B．抗体从合成到分泌不经过高尔基体C．高尔基体膜主要由磷脂和蛋白质构成D．高尔基体具有对蛋白质进行加工、分类、包装、转运的功能