未知题型 所有联入Intemet的计算机都遵从相同的通信协议，这个协议是D.POP3

判断题 垂直截渗墙、帷幕灌浆、板桩等均属于垂直截渗（ ）。

多项选择题 What are the methods to help you make a strong prepared speech? ( )A. Understand the audience and occasion.B. Decide on a central point or purpose.C. Use various supporting materials.D. Use clear organization.