Passage 1:
文本： The next important change in bicycle design led to the creation in the 1880s of the basic form of the modern bicycle. The safety bicycle, as the new device was known, saw a return to two same-size wheels. It was powered by pedals in the middle of the frame. These pedals were attached with a chain and gears to the rear wheel. This arrangement meant that the rider, seated on the frame between the wheels, could attain the same speed as with the high wheeler, but without the dangers associated with the huge front wheel. In addition to these design changes, there was the introduction of the pneumatic tyre, developed in 1888 by Scottish veterinary surgeon John Dunlop. This involved a tube inflated with air being inserted inside the hard rubber outer tyre, thus providing a considerably more pleasant ride.
文本： The next important change in bicycle design led to the creation in the 1880s of the basic form of the modern bicycle. The safety bicycle, as the new device was known, saw a return to two same-size wheels. It was powered by pedals in the middle of the frame. These pedals were attached with a chain and gears to the rear wheel. This arrangement meant that the rider, seated on the frame between the wheels, could attain the same speed as with the high wheeler, but without the dangers associated with the huge front wheel. In addition to these design changes, there was the introduction of the pneumatic tyre, developed in 1888 by Scottish veterinary surgeon John Dunlop. This involved a tube inflated with air being inserted inside the hard rubber outer tyre, thus providing a considerably more pleasant ride.
Passage 2:
Manufacturers experimented with various designs, but the Rover, created by English inventor and industrialist John Starley, became the most successful and most copied. Virtually all the Rover's features are present on today's bicycles: a diamond-shaped frame, pedals below the saddle that power the back wheel through a chain and gears, and handle bars attached to the front wheel.
Manufacturers experimented with various designs, but the Rover, created by English inventor and industrialist John Starley, became the most successful and most copied. Virtually all the Rover's features are present on today's bicycles: a diamond-shaped frame, pedals below the saddle that power the back wheel through a chain and gears, and handle bars attached to the front wheel.
📝 题目要求
找出文本中的逻辑关系词,并写出对应的逻辑类型
找出文本中的逻辑关系词；并写出所对应的逻辑类型：
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✅ 参考答案与解析
答案： 1. led to：因果（表示设计变化导致了现代自行车的诞生） 2. but：转折（对比安全自行车与高轮自行车的安全性） 3. In addition to：并列（引入另一项补充性的设计变化） 4. thus：因果（表示充气轮胎带来的结果） 5. but：转折（对比各种实验设计与最终成功的设计） 6. and：并列（列举Rover自行车及现代自行车的特征）