Sow the ___________ in May or June. A: seeds B: salt C: reeds D: reads

_________ were used to build the Great Wall in history. A: Branches and reeds B: Soil and sands C: Bricks and stones D: All of the above

以下哪些曲线可以用于状态空间采样（ ） A: Dubins曲线 B: Reeds-shepp曲线 C: B样条曲线 D: 高次多项式曲线

9-1节自动代客泊车案例中，使用______进行泊车路径的规划。（） A: Dubin曲线 B: 回旋曲线 C: Reeds-Shepp曲线 D: 样条曲线

“If Winter comes, can Spring be far behind?"The quoted line comes from ______. A: John Keats' Ode on a Grecian Urn B: Yeats' The Wind Among the Reeds C: John Milton's Paradise Lost D: Shelley's Ode to the West Wind