下图是美国1821—1920年新增欧洲移民示意图。下列属于这一期间移民因素的是(   )

①英国与美国的历史渊源②法西斯大规模迫害犹太人

③躲避第一次世界大战的战火④第二次工业革命促进人口迁徙

短文改错：假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
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。
    It was 7:15 in the morning of February 8, 2007. I was walking along Park Road towards the east while an old man came out of the park on the other sides of the street. Then I saw a yellow car drive up Third Street and made a right turn into Park Road. The next moment the car hit the man while she was crossing the road. He fell with a cry. The car didn't stop and drive off at full speed heading west. I noticed the driver was young woman wore a pair of glasses and the plate number was AC864. After two minutes later, I stopped a passed car and took the old man to the nearest hospital.

已知抛物线y₁=ax²﹣4ax+3（a≠0）与y轴交于点A，A、B两点关于对称轴对称，直线OB分别与抛物线的对称轴相交于点C．

新中国成立初期，中央人民政府的施政方针是

比一比，再组词。

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