In order to conduct optimized signal control at roundabout and improve the service level, two methods of signal design for cross roundabouts are compared, one is the multi-approach going combined with circulating road control, the other is each phase for entrance. After the.

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Chapter one is contact, through analyzing and comparing other missionaries and John Fryers viewpoints on China, this thesis unfold some basic circumstances of China after the Opium War (1840-1842). Then draw the cause why John Fryer changed his mind.

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