题目

Right in front of the Minneapolis Central Library, a row of green hikes sits parked in a special stand. Each hike is designed with the logo “Nice Ride” the name of the city’s bike-share program.Nice Ride bikes are a lot like the library books that people come here to borrow. To rent a bike, you simply use your membership card at a Nice Ride bike station. Members can rent one of 1, 200 bikes from 138 stations throughout Minnesota’s largest city. People use the Nice Ridebikes to go to work, to go out on business, or just to enjoy the city’s many bike paths.The rise of bike-share progra下列材料属于有机合成材料的是A．陶瓷 B．黄铜 C．羊毛 D．塑料