单项选择题

One of the most promising methods of storing hydrogen fuel is ______.

A．in gas form
B．putting it in liquid
C．preserving it in tanks
D．in the form of metal hydrides
<上一题 目录 下一题>
热门 试题

单项选择题
What does the passage mainly discuss
A．The production of solar light and heat.
B．The physical and chemical nature of life.
C．The conversion of Hydrogen to helium.
D．Radiation in the X - ray part of the spectrum.
单项选择题
It can be inferred from the passage that the Sun's light travels
A．through solid objects in space
B．in many different directions
C．more slowly than scientists previously believed
D．further in summer than in winter
相关试题