单项选择题

The word "think-tank" (Line 5, Para. 2) here means__________.

A．an enclosed heavily armored combat vehicle that moves on tracks
B．a large receptacle for holding water
C．a corporation or group organized for interdisciplinary research in technological or social problems
D．a prison cell or enclosure used for receiving prisoners

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单项选择题

Which of the following statements is NOT TRUE about the awake system

A．The owner of Mercedes will own the patent of the safety system.
B．If the trials are successful, all the long-distance trucks must install this system.
C．The trial will cost more than $4,000,000 both on the part of the EU and private investment.
D．The safety system also monitors braking frequency as no one drives in exactly the same way.

单项选择题

Which of the following best describes the theme of this article

A．How to Reduce Car Accidents in Europe
B．Vibrating Seats to Save Lives of Dozing Drivers.
C．Awake System—the Best Solution to Car Accidents.
D．Intelligent Cars.