下图为番茄电池,下列说法正确的是
A.一段时间后,铁极质量会变大
B.溶液中的H+ 向石墨电极移动
C.电子由石墨电极通过导线流向铁极
D.铁电极是该电池的正极
答案:B
His aunt’s letters ________ of those beautiful days when they used to live together
in his hometown.
A.call him on
B.call him for
C.call him up
D.call him in
女,56岁。戴全口义齿月余,说话时频繁出现哨音,不可能的原因是
A.后部牙弓狭窄B.腭侧基托前部的磨光面太光滑C.下前牙舌侧基托太厚D.前牙舌面过于光滑E.下前牙排列过于向舌侧倾斜