下表是英国消费品价格指数变化情况，导致表中价格指数变化的主要原因是（    ）

增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；2.只允许修改10处，多者（从第11处起）不计分。

    The incident had happened on my way to a bookstore on the rainy Sunday afternoon.I was waiting for the green light when a girl about ten was knocked down by a passing car,that drove off quickly.A man immediately rushes to the girl to give him first aid.I joined in without hesitation.A young woman called 110 and the polices soon arrived at the scene.Fortunate she was not badly injured and we sent her to the nearest hospital.Comparing with the escaped driver,I am proud of that I did.

某工厂的工业废水中含有大量的FeSO₄以及一定量的CuSO₄和Na₂SO₄，为减少污染并变废为宝，某学习小组设计以下流程，拟从该废水中回收硫酸亚铁、金属铜，并利用氨碱法原理“制碱”．（除标注外，所加药品或试剂均过量，部分产物及反应条件略去）

回答下列问题：

Six and six is____