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问题 选择题

分解因式：x2-2xy+y2+x-y的结果是[ ]

A、（x-y）（x-y+1）

B、（x-y）（x-y-1）

C、（x+y）（x-y+1）

D、（x+y）（x-y-1）

答案

答案：A

改错题

短文改错：

下面短文中有10处语法错误。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（∧）,并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

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11处起）不计分。

Did you enjoy yourself yesterday? I suppose you did. But I’d like to tell you how a bad day I had yesterday. Nothing just went wrong. In the morning, my alarm clock didn’t ring, so I woke up an hour late. I was in such hurry that I burnt my hand when I was cooking the breakfast. Then I ran out of the house to catch the 8:30 buses. This is the bus I usually take. But, you may laugh, I missed it of course. I am very unhappy and scared as well because teacher hates the students coming late to school. So I ran three miles to school only to discover that nobody was there. The school was quiet but peaceful. Our classroom was locking. I realized in that moment: It was Sunday.
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单项选择题

科目编码一般用( )来表示。

A．数字

B．汉字

C．空格

D．&、@等符号
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