The Lampbrella is a standardlooking street lamp fitted with an umbrella canopy.It has a builtin electric motor which can open or close the umbrella on demand.Sensors(传感器)then ensure that the umbrella offers pedestrians shelter whenever it starts raining.
In addition to the rain sensor,there’s also a 360° motion sensor on
the fiberglass street lamp which detects whether anyone is using the Lampbrella.After three minutes of not being used the canopy is closed.
According to the designer,the Lampbrella would move at a relatively low speed,so as not to cause harm to the pedestrians.Besides,it would be grounded to protect from possible lightning strike.Each Lampbrella would offer enough shelter for several people.Being installed(安装) at 2 metres off the ground,it would only be a danger for the tallest of pedestrians.
While there are no plans to take the Lampbrella into production,Belyaev says he recently introduced his creation to one Moscow Department,and insists his creation could be installed on any street where a lot of people walk but there are no canopies to provide shelter.(2017·山东,C)
68.Which of the following shows how the Lampbrella works?
A.motor→canopy→sensors
B.sensors→motor→canopy
C.motor→sensors→canopy
D.canopy→motor→sensors
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