问题 单项选择题

CCITT X.400系列建议书定义了多种类型的实体。组成MTS的实体是 ( )

A.UA

B.AU

C.MTA

D.MS

答案

参考答案:C

读图,回答有关问题

图一
图二

(1)图一和图二分别是哪两种交通工具?这两种交通工具分别以什么为动力?                                                                                                                                                                (2)结合生活实际,说说这些发明创造对社会发展的促进作用。                                                                                                                                                                                                                                                                                                                                (3)现在交通工具越来越多,带来了许多负面影响,请你说说,并谈谈你得到的启示。                                                                                                                                                                                                                                                                                                                                

单项选择题