单项选择题

A．A more economical diesel fuel.
B．Characteristics of a new type of fuel.
C．Where a new energy source is located.
D．How to develop alternative energy sources.
<上一题 目录 下一题>
热门 试题

单项选择题
Rosa Parks is a pioneer in the fight for legal changes in minority rights.
A．Y
B．N
C．NG
相关试题