题目

What do you use to get around town? A car? A bike? Your feet ? perhaps you should try a segway! The Segway is perfect for short journeys. It’s an electric vehicle that consists of a platform between two wheels, with a pole that connects the platform to the handlebars. To ride it , you step up onto the platform, and control the Segway by moving your body. Lean forwards to go faster, and back-wards to slow down. On older models, direction was controlled by a twist grip（扭转把手）on the left handlebar. This varies the speeds between the two motors, and a decrease in the speed of 如图，矩形OABC的面积为15，其OA边在x轴上，OC边在y轴上，且OA比OC大2，函数y=（k≠0）的图象经过点B．小题1:求k的值．小题2:将矩形OABC分别沿AB，BC翻折，得到矩形MABD和矩形NCBE．线段MD、NE分别与函数y=（k≠0）的图象交于F、G两点，求线段FG所在直线的解