【单选题】联合国气候变化大会于2009年12月7~18日在哥本哈根召开。承诺,到2020年,单位GDP二氧化碳排放比2005年下降40%~45%。有效“减碳”的手段之一是节能。下列制氢方法最节能的是 [ ]
A.
电解水制氢:2H 2 O 2H 2 ↑+O 2 ↑
B.
天然气制氢:CH 4 +H 2 O CO+3H 2
C.
高温使水分解制氢:2H 2 O 2H 2 ↑+O 2 ↑
D.
太阳光催化分解水制氢:2H 2 O 2H 2 ↑+O 2 ↑
【简答题】She looked at Martin wearily and it seemed to her that it was a great many years since they had set out that morning.
【单选题】帕金森病的发病机制不包括()
A.
纹状体内多巴胺含量降低,乙酰胆碱功能相对亢进
C.
氧化应激、线粒体功能缺陷、蛋白质错误折叠和聚集
【单选题】'You needn't be so rude about it,' my wife answered as she looked at herself the mirror.
【单选题】帕金森病的发病机制是( )
A.
纹状体中多巴胺含量减少,乙酰胆碱作用相对增强
B.
纹状体中乙酰胆碱含量减少,多巴胺作用相对增强
【单选题】I looked at it again. She right! It was!
【单选题】She looked at the pretty vase I bought at the market and said it was a real _____.
【简答题】Give the definition of the underlined phrase. . . . She looked at Martin wearily and it seem to her ...
【单选题】She looked at the painting and wondered where she ______ it. [ ]