2. 外语
  3. Balbir wants to guide a robot along the white squares through this maze. The robot starts on the square marked " Entrance" , and

Balbir wants to guide a robot along the white squares through this maze. The robot starts on the square marked " Entrance" , and

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问题 Balbir wants to guide a robot along the white squares through this maze.
The robot starts on the square marked " Entrance" , and must finish on the square marked
"Exit".
It can only move FORWARD, TURN RIGHT 90° and TURN LEFT 90°.
Which instructions will guide the robot through the maze?
选项 A、FORWARD 4, TURN LEFT 90°, FORWARD 2, TURN RIGHT 90 , FORWARD 3, TURN RIGHT 90 , FORWARD 5.
B、FORWARD 3, TURN RIGHT 90 , FORWARD 1, TURN RIGHT 90 , FORWARD 3, TURN LEFT 90 , FORWARD 3.
C、FORWARD 3, TURN LEFT 90 , FORWARD 1, TURN RIGHT 90 , FORWARD 2, TURN RIGHT 90 , FORWARD 4.
D、FORWARD 3, TURN RIGHT 90 , FORWARD 1, TURN LEFT 90 , FORWARD 2, TURN LEFT 90 , FORWARD 4.
答案C
解析 前移三个格，左转90度，再前移一个格，右转90度，再前移两个格，右转90度，前移四个格就可以出去了，但每前移一格都不包括机器人所站的那一格。
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本试题收录于： D类竞赛（专科）题库大学生英语竞赛（NECCS）分类
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大学生英语竞赛（NECCS）

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