化简求值(m+n)2-2(m-n)(m+n)+(n-m)2,其中m=2010,n

题型:计算题

问题:

化简求值(m+n)2-2(m-n)(m+n)+(n-m)2,其中m=2010,n=-3。

考点:整式的加减乘除混合运算
题型:计算题

The day is like any other day in his life. Tom walks past the shop on the street corner. He stops to look at the front row of shoes, and he feels happy to see that the pair of shoes he wants very much is still there. Looking down at his old shoes, he feels sorry for himself. He really wants to have them for his birthday.

He sadly walks away and thinks how to tell his mother about it. He knows very well she has little money. He decides not to go home at once , as he looks sad and his mother will notice(注意) it. So he goes to the park and sits on the grass. There he sees a boy moving a wheelchair(轮椅)with his hands . Tom looks at him and is surprised to see that the boy has no feet. He looks at his own feet. “It’s much better to be without shoes than without feet”, he thinks. There is no reason or him to feel so sorry and sad. He goes away and smiles, thinking he is happier.

小题1:Tom passes the shop ______.

A.on foot

B.by bike

C.in a wheelchair

D.by bus小题2:Tom stops in front of the shop because he wants to ______ .

A.buy the shoes

B.look at the shoes he liked

C.buy a present for his friend

D.get something for his birthday party小题3:Why did Tom go to the park? Because ______.

A.many nice shoes are sold(卖) there

B.he wants to play there for a while

C.he wants to see his disabled(残疾的) friend

D.he doesn’t want to make his mother worried小题4: We can learn from the story that Tom ______ .

A.doesn’t like old shoes

B.loves his mother very much

C.doesn’t want to stay at home

D.has no feet

题型:计算题

某同学对所学的部分化学知识归纳如下:其中完全正确的一组是(  )

物质的性质与用途能源与环境

A

氢气、氧气有可燃性--作燃料

一氧化碳有还原性--炼铁

氮气有稳定性--作保护气

B

煤、石油燃烧--无污染

车用乙醇汽油--减少污染

氢能--无污染

食品安全安全知识

C

假酒中毒--甲醇引起

D

煤气中毒--由一氧化碳引起
工业用盐中毒--亚硝酸钠引起瓦斯爆炸--由甲烷引起
除鱼胆汁苦味(酸性)--纯碱溶液浸泡浓硫酸沾到皮肤上--用氢氧化钠溶液中和

A.A

B.B

C.C

D.D

题型:计算题

先化简再求值, [(x+2y)(x-2y)-(x+4y)]÷4y,其中x=5,y=2。

题型:计算题

在日常生活中,我们经常使用一些成语来形容事件发生的可能性大小,这四个成语中,可能性最小的是[ ]

A.平分秋色    

B.百发百中    

C.希望渺茫    

D.十拿九稳

题型:计算题

本例诊断有价值的辅助检查方法是

A.尿hCG测定
B.血hCG测定
C.X线腹部摄片
D.B超
E.CT检查

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