在气压传动中,压缩空气的工作压力较低,一般为()MPa。
A.0.2~0.4
B.0.4~0.6
C.0.4~0.8
D.0.6~1.0
参考答案:C
In his article, you can feel the ______ of two different culture. [ ]
A. crash
B. hit
C. contest
D. collision
简述磷酸燃料电池的组成、结构和工作原理。