单项选择题
At the airport, Ground Control must guide a plane from point T to the
beginning of the runway R, ready to take off, avoiding any trees on the
way. The plane can only move FORWARD, TURN LEFT 90° or TURN
RIGHT 90°. Which set of instructions will guide the plane to the runway,
avoiding any trees
A. FORWARD 3, RIGHT 90°, FORWARD 2, LEFT 90°,
FORWARD 5.
B. FORWARD 1, LEFT 90°, FORWARD 2, RIGHT 90°, FORWARD 7.
C. FORWARD 3, RIGHT 90°, FORWARD 3, LEFT 90°, FORWARD 6.
D. FORWARD 1, RIGHT 90°, FORWARD 2, LEFT 90°, FORWARD 7.
B. FORWARD 1, LEFT 90°, FORWARD 2, RIGHT 90°, FORWARD 7.
C. FORWARD 3, RIGHT 90°, FORWARD 3, LEFT 90°, FORWARD 6.
D. FORWARD 1, RIGHT 90°, FORWARD 2, LEFT 90°, FORWARD 7.
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