Speaker A: If I were you, I'd ride a bike to work. Taking a crowded bus during rush hours is really terrible.Speaker B: ______

A．Yeah, riding a bike is a healthful activity. Don't you think

B．Yes, you're right. Buses are always very crowded during the rush hours.

C．Thank you for your advice. But my bike has got a flat tyre.

D．Certainly. I don't see Why so many people go to work by bus rather than by bike.

《中国制造2025》指出：智能制造是主攻方向，也是从制造大国转向制造强国的根本路径。这表明我国（）

①运用产业政策实行科学的宏观调控

②把拓宽市场作为建设制造强国的关键

③竖持走中国特色的新型工业化道路

④大力发展资本市场以推动制造业升级

A、①④

B、①③

C、②③

D、②④