Some physics problems in this book are _____ difficult for the students ____ work out. A. so; that B. not; but C. such; that D. too; to 答案:D
下图为氢氧燃料电池原理示意图,按照此图的提示,下列叙述不正确的是
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A.
a电极是负极
B.
b电极反应式为:4OH――4e-=2H2O+O2↑
C.
该电池是具有广泛发展前景的绿色电池
D.
该电池是一种不需要将还原剂和氧化剂全部储藏在电池内的新型发电装置