You plan to give an on-site presentation. The external display available for your audience is a 42-inch flat panel monitor. You need to ensure that the presentation on the monitor of your computer is duplicated on the external monitor for the audience. What should you do?（） ["A","B","C","D"]
罗杰斯认为（）
为改善低碳钢加工性能应采用（）。 ["正火","退火或回火","淬火","调质"]
它是一种仿教科书式的论文，其在目次上存在的主要问题是（）。 ["概述的设置","数学基础的介绍","传感器基础的介绍","“人工神经网络在目标识别中的应用”篇幅比例偏少"]
与重力坝相比拱坝的（）荷载，降为次要荷载。 ["水压力","自重","温度荷载","扬压力"]
简述二十世纪的主要儿童观。
