并联机器人结构有四个或四个以上串联机器人来支撑末端执行器
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精度是指传感器的测量输出值与实际被测量值之间的误差。
A. 对
B. 错
使用外部传感器,使得机器人对外部环境具有一定程度的适应能力
A. 对
B. 错
Up to now, we _______ any news from her.
A. have not received
B. did not receive
C. had not received
D. not receive
I had intended to call on you, but someone ______ to see me.
A. come
B. came
C. had come
D. did come
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