Later, development forked again with the advent of mopeds, small motorcycles fitted with pedals that can be used as a starting aid but which cannot, practically, be ridden under pedal power alone.

• 是对重点播音主持培训、设备、线路、建设施工场地进行再排查，坚决消除事故隐患，同时加强对营业厅、办公楼安保人员的教育和培训，提高反恐意识，确何万无一失。