问题 选择题
y=
2x-1
+3
1-2x
-2
,则代数式xy的值为(  )
A.4B.
1
4
C.-4D.-
1
4
答案

根据题意,得

2x-1≥0
1-2x≥0

解得x=

1
2

∴y=-2;

∴xy=(

1
2
)-2=4.

故选A.

改错题

第Ⅱ卷(共35分)

第四部分:写作(共两节,满分35分)

第一节 短文改错(共10小题;每小题1分,满分10分)

此题要求改正所给短文中的错误.对标题号的每一行做出判断:如无错误,在该行右边的横线上划(√);如有错误(每行只有一个错误),则按下列情况改正:

此行多一个词: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。

此行缺一个词: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。

此行错一个词: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。

Daniel and Lisa lived next door to a nice lady named Mrs

Green.She was very good cook and often                    76.________

made for delicious cakes.The children could smell          77.________

them."How can you get some cakes?" Daniel said to Lisa,          78.________

"We can't go and ask for some.That does not seem politely."   79.________

"I know which to do," Lisa said."Come with me." Then       80.________

they went Mrs Green’s house.Lisa knocked at the door       81.________

and Mrs Green opened it.Lisa said, "Hello, do you play      82.________

with us?" She laughed and asking, "What game do you         83.________

want to play?" "We want to play 'In a zoo'.We are           84.________

animals and you are the keeper who feed us with your         85.________

cakes. All right? "

单项选择题