单项选择题

On the development of the electro-car, the main problem is ______.

A．nothing technical
B．electricity is too expensive
C．the speed of the car is not fast enough
D．the weight of the battery
<上一题 目录 下一题>
热门 试题

单项选择题
The earthquake in northern Iran killed at least ______ people.
A．9
B．25
C．34
D．80
单项选择题
What is the main reason for citizens to take in hand the defense of themselves
A．There are not enough policemen.
B．They do not trust the rule of law.
C．The police force is inefficient.
D．Security devices do not work.
相关试题