【简答题】Write out the names of transportation according to the descriptions.( 根据描述写出下列交通工具) 1. underground railway in a city ( ) 2. two-wheeled vehicle, using pedals to drive it along ( ) 3. large ...
【简答题】The Segway Human Transporter was invented by Dean Kamen.It is a two-wheeled vehicle designed for a single rider standing upright over its single axle(轴) and navigate using a set of handlebars resembli...