填空题

59（）

【参考答案】

B

<上一题目录下一题>

热门试题

单项选择题

In London, how does they solve the problem of the traffic congestion（）

A．They take a completely-free bus service.
B．They experimented a very cheap bus service.
C．Part of the street is for buses only.
D．They closed the streets to cars.

单项选择题

Paul Moller’s flying car is different than an airplane because（）

A．it has no wings
B．it uses solar power
C．it takes off and lands vertically
D．it can land on water