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
）的下列叙述：①能使酸性KMnO4溶液褪色②可发生加聚反应；③可溶于水④可溶于苯中⑤能与浓硝酸发生取代反应⑥所有的原子可能共平面，其中正确的是（ ）
