公安机关是人民民主专政的重要工具，这是公安机关的阶级属性，也_爱下问搜题

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问题判断题

公安机关是人民民主专政的重要工具，这是公安机关的阶级属性，也是它的根本属性。 ( )

答案

参考答案：对

改错题

短文改错。

此题要求改正所给短文中的错误.对标有题号的每一行做出判断:如无错误,在该行右边横线上画一个勾(∧)；如有错误(每行只有一个错误),则按下列情况改正:
该行多一个词:把多余的词用斜线(／)划掉,在该行右边横线上写出该词,并也用斜线划掉.
该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词.
该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词.
注意:原行没有错的不要改.

Mrs．Brown was an old lady with just one son who lived far
away from him. On her 80th birthday, she was sure that even if
her daughter could not come for a visit, but she would at least
receive a present to her daughter．After all, eighty was a special
birthday, one should not be forgotten．The old lady waited so
eager that she stood at the front door for a whole day．Her
daughter didn't show up．However, the old lady got the parcel
in which there were a printed card along with a cheque．She
felt very disappointed and she tears the cheque into pieces．
Everyone but a caring daughter or son could write a cheque．

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填空题

()、()、()是物料需求计划的目标。