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【单选题】
镍氢充电电池( Ni-MH,KOH作为电解液)已经开始用于汽油/电动混合动力汽车上 ,该电池的总反应方程式如下: Ni(OH) 2 + M NiOOH+MH (M表示储氢合金),下列叙述正确的是( )A.
放电、负极附近溶液的 pH均不变
B.
放电时正极材料为MH，发生氧化反应
C.
充电时阳极反应为：Ni(OH) 2 + OH － － e － === NiOOH + H 2 O
D.
放电时每转移1 mol电子，负极有1 mol NiOOH被还原
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【单选题】The corona rays become weak and invisible when they reach the Earth, because the Earth is far away from the Sun.
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】An increase in the domestic interest rate shifts the expected return schedule for _________ deposits to the _________ and causes the domestic currency to appreciate.
A.
domestic; right
B.
domestic; left
C.
foreign; right
D.
foreign; left
【单选题】An increase in the domestic interest rate shifts the expected return schedule for _____ deposits to the _____ and causes the domestic currency to _____.
A.
foreign; right; appreciate
B.
domestic; right; appreciate
C.
foreign; left; depreciate
D.
domestic; left; depreciate
【单选题】A decrease in the domestic interest rate shifts the expected return schedule for _________ deposits to the _________ and causes the domestic currency to depreciate.
A.
domestic; right
B.
domestic; left
C.
foreign; right
D.
foreign; left
【简答题】晶体中原子常见的扩散机制有_____________和______________。
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