As there is less coal and oil, scientists are exploring new ways of making use o

题干

As there is less coal and oil, scientists are exploring new ways of making use of _____ energy, such as sunlight, wind, and water for power and fuel.

A．primary	B．alternative
C．instant	D．unique

上一题下一题 0.85难度单项选择更新时间:2010-04-23 01:15:38

小学学科试题库

初中学科试题库

高中学科试题库