私醫聯招 英文歷屆試題｜第 471 題

The tropical boxfish, roughly the shape of a box, looks as if it would have trouble moving through the water.  (21) , the boxfish is in fact an excellent swimmer that cuts through the water extremely smoothly. Ronald Fricke and his colleagues created a model which was placed inside a wind tunnel, a  (22)  that was used to study how air moved around solid objects. Amazingly, the boxfish shape reportedly performed over 65 percent better than today’s compact cars. It should be possible to  (23)  an efficient shape for use in the body of a car to reduce its air resistance. Less air resistance would mean less fuel required to run a car—something which is  (24)  to all drivers in times of expensive fuel. Thus, engineers set to work to try to solve the  (25)  of how this unlikely shape could be so efficient. Their efforts were rewarded, and the car they created would be the Mercedes Bionic concept car.