A-A+
What measured how much lift the robot produced
问题详情
What measured how much lift the robot produced？
A．two vertical rods(杆)
B．a movement detector
C．an elastic(弹性的)band(带子)
D．both B and C 请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
问题问“什么测量机器人升起的高度?”被选项是一些测量器材，利用被选项的内容作为答案线索，这样发现答案相关句：Theteamattached(系)therobottotwoverticalrods，soitcouldslide(滑)upanddown．Atthestartofatest，therobotwassuspended(悬挂)byanelasticband．Amovementdetectormeasuredhowmuchliff，ifany(如果能升起的话)，therobotproducedforanygivenmovement．划线结构表明测量工具是B(运动探测器)
