单项选择题

露天矿生产汽车统一调度实时控制系统，通过计算机统一生产调度系统，实现了运输设备()的最佳选择，减少了汽车排队、待装、待卸、空车运行以及电铲等车时间，最大限度地发挥了采运设备的生产效率。

A.行车路线
B.路径
C.型号
D.载荷

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Which of the following statements is true of Orange Countys Great Park?
A．It was formerly a military airport near southern California.
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C．It shows American attitudes towards nature have changed a lot.
D．It is likely to become the largest landscaped municipal park.

A.It
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D.
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