单项选择题

Which of the following is the best solution to the problems mentioned in the passage

A．The designing of highly efficient car engines.
B．A reduction of vehicle use in cities.
C．The development of electric cars.
D．The use of less polluting fuels.
<上一题 目录 下一题>
热门 试题

单项选择题
Which of the following statements is TRUE according to the passage
A．The decline of public transportation accounts for increased car use in western Europe.
B．Cars reduction of vehicle use is the only sustainable option in densely populated western Europe.
C．The reduction of vehicle use is the only sustainable option in densely-populated Western Europe.
D．Western European oil companies cannot sustain the cost of developing new-type fuels.
单项选择题
It can be concluded from the passage that the immune systems of animals ________.
A．can be weakened by conditioning
B．can be suppressed by drug injections
C．can be affected by frequent doses of saccharin
D．can be altered by electric shocks
相关试题