When you connect an external monitor to your portable computer, the same image appears on both monitors. You need to drag a window from one monitor to the other. What should you do?（） ["A","B","C","D"]
桑代克提出的学习规律包括（）。 ["强化律","练习律","准备律","效果律","同化律"]
胎盘
滑车是（）。 ["简易起吊工具","动力设备","牵引设备","降机"]
男性，60岁，进行性吞咽困难6个月，消瘦、贫血，左侧锁骨上窝有2cm直径的淋巴结肿大，质硬，不能推动，应首先考虑为（） ["早期食管癌","中期食管癌","晚期食管癌","早期胃癌","进展期胃癌"]
按调节周期长短分，兴利调节可分为（）调节、（）调节、（）调节、（）调节和（）调节。
