题干
He is taller than_____ in his class.
A：other
B：all the student
C：any other one
D：the other
答案(点此获取答案解析）
C
2Fe3++2H2O = SO42- +2Fe2++4H
+；然后再加入K2Cr2O7溶液，发生反应：Cr2O72-+6Fe2++14 H+ ="2" Cr3++6Fe3++7H2O。下列判断正确的是（ ）