单项选择题

A．nothing technical
B．electricity is too expensive
C．the speed of the car is not fast enough
D．the weight of the battery
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单项选择题
A．the efficiency of the engines has improved a lotB．the engines are more powerfulC．people like driving fastD．highways provide enough chances for fast driving
A．the efficiency of the engines has improved a lot
B．the engines are more powerful
C．people like driving fast
D．highways provide enough chances for fast driving
单项选择题
A．Petrol consumption.B．Speed.C．Safety.D．Comfortability.
A．Petrol consumption.
B．Speed.
C．Safety.
D．Comfortability.
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