将氢气、甲烷、乙醇等物质在氧气中燃烧时的化学能直接转化为电能的装置叫燃料电池．燃料电池的基本组成为电极、电解质、燃料和氧化剂．此种电池能量利用率可高达80%，产物污染也少．下列有关燃料电池的说法错误的是[ ]
A．上述燃料电池的负极反应材料是氢气、甲烷、乙醇等物质
B．氢氧燃料电池常用于航天飞行器，原因之一是该电池的产物为水，经过处理之后可供宇航员使用
C．乙醇燃料电池的电解质常用KOH，该电池的负极反应为：C2H5OH－12e－===2CO2↑＋3H2O
D．甲烷燃料电池的正极反应可以为：O2＋2H2O＋4e－===4OH－
答案：C
| 用方框中所给短语的适当形式填空。 | |
2. English is spoken as a second language in countries, _________India,Singapore and Malaysia. 3. Hard work___________in his success. 4. The film___________a novel written by D. H. Lawrence. 5. She is _____________ a teacher to me; she is also my friend. 6. ___________,Bill cheated in the college entrance exam. 7. They didn't go hiking __________ the heavy rain. 8. We must______________every minute to study. 9._________students have passed the exam. 10.Sorry, I can't go with you. Something has just ______. |