题目

—Hello, Peter. Do you enjoy your stay in Hainan?    —I ________ in Hainan. The flood stopped me from going there. So I came to Shanghai. A. haven't stayed       B. do not stay       C. didn't stay         D. am not staying 答案：D3．下列叙述符合物理学史事实的是（　　）A．伽利略通过理想斜面实验，得出“力不是维持物体运动原因”的结论B．牛顿发现了万有引力定律，并通过“实验测出万有引力常量”C．法拉第经过十多年的实验，发现了电流的磁效应D．麦克斯韦发现了电磁感应现象，预言了电磁波的存在