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将工件放入支架上，（）光电传感器检测工件颜色。 A. 反射式 B. 漫射式 C. 折射式 D. 对射式

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13到14世纪，迅速发展的西方经济寻求更大的市场空间，向东扩展成为他们解决问题的唯一办法。传统的陆路交通已经无法满足欧洲人的需求，随着15世纪末到16世纪初　　　　　以及新航线的开辟，欧洲国家纷纷走上海外贸易和海外扩张的道路。

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单项选择题

It was a display so impressive that West Virginia Coach Don Nehlen shuddered. "I hope that team is Number 1," he said while shaking his head moments after top-ranked Ohio State slammed the door on Nehlen's 11th-ranked Mountaineers, 34-17.
Which of the following is CORRECT according to the above report?
A、Nehlen is the coach of the West Virginia team.
B、Mountaineers is the nickname of Ohio State.
C、Ohio State was defeated by West Virginia.
D、West Virginia ranked No. 1.