题干
He made a lot of mistakes in the exam his carelessness.
A：because
B：as
C：because of
答案(点此获取答案解析）
C
He made a lot of mistakes in the exam his carelessness.
A：because
B：as
C：because of
Cl ＋ 2MnCl 2＋ 5Cl 2↑ ＋ 8H2O反应中，氧化剂是
