The shipping authorities followed the______ of the unidentified submarine on their radar screens.

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问题 The shipping authorities followed the______ of the unidentified submarine on their radar screens.

选项 A、channel
B、way
C、course
D、direction

答案C

解析船运当局在雷达屏幕上追踪不明潜艇的轨迹。course轨迹，进程。channel频道。way路。direction方向。由此可见C项符合题意。

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C类竞赛（非英语专业本科）

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