1.若一个扇形所在的圆心角缩小为原来的2分之1,半径扩大为原来的2倍.则它的面积扩大为原来的___倍.
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1.若一个扇形所在的圆心角缩小为原来的2分之1,半径扩大为原来的2倍.则它的面积扩大为原来的___倍.
2.下列说法中错误的是()
A π的值等于3.14 B π的值是圆周长与直径的比值 C π的值与圆的大小无关
英语:1.There is __ SPCA officer at the school gate.He's going to give us a lecture on how to protect animals.
A a B an C the D /
2.They spent four ___ yuan building the school library.
A million B millions C million of D millions of
3.-Would you like ___ cup of coffee?
-Yes,please.
A others B the others C other D another
4.Yon can ___ your puppy to a park for a walk every day if you are free.
A make B give C play D take
5.Children enjoy ___ cartoons because they are interesting.
A watch B to watch C watching D to watching
6.Mary loves making paper flowers.She ___ it from her grandma this coming holiday.
A learns B learned C is going to learn D is learning
7.We were ___(luck)enough to catch the last bus and find two seats on it.
8.You can find English books ___(easy)in this library.
9.The movie is very interesting.(改为感叹句)
____ ____interesting movie it is!
10完形填空
This is a story about a famous A___ woman.Her name is Helen Keller.When she was o____ nineteen months old,she got an illness and then became blind and deaf.She c___ see or hear anything.So she couldn't learn to s___.
When she was six,a young teacher came and taught her to read and write.Her name was Ann Sullivan.Later,Miss Sullivan took her to a___ teacher,Sarah Fuller.
Helen began to learn to speak b___ putting her fingers on Miss Fuller's face and lips.
As we know,Helen became on of the few greatest female w___ in the world.
2.下列说法中错误的是()
A π的值等于3.14 B π的值是圆周长与直径的比值 C π的值与圆的大小无关
英语:1.There is __ SPCA officer at the school gate.He's going to give us a lecture on how to protect animals.
A a B an C the D /
2.They spent four ___ yuan building the school library.
A million B millions C million of D millions of
3.-Would you like ___ cup of coffee?
-Yes,please.
A others B the others C other D another
4.Yon can ___ your puppy to a park for a walk every day if you are free.
A make B give C play D take
5.Children enjoy ___ cartoons because they are interesting.
A watch B to watch C watching D to watching
6.Mary loves making paper flowers.She ___ it from her grandma this coming holiday.
A learns B learned C is going to learn D is learning
7.We were ___(luck)enough to catch the last bus and find two seats on it.
8.You can find English books ___(easy)in this library.
9.The movie is very interesting.(改为感叹句)
____ ____interesting movie it is!
10完形填空
This is a story about a famous A___ woman.Her name is Helen Keller.When she was o____ nineteen months old,she got an illness and then became blind and deaf.She c___ see or hear anything.So she couldn't learn to s___.
When she was six,a young teacher came and taught her to read and write.Her name was Ann Sullivan.Later,Miss Sullivan took her to a___ teacher,Sarah Fuller.
Helen began to learn to speak b___ putting her fingers on Miss Fuller's face and lips.
As we know,Helen became on of the few greatest female w___ in the world.
1.扇形面积公式=0.5*圆心角*半径的平方.那么圆心角减半,半径变为原来2倍,面积增大为0.5*2*2=2倍.
2.正如B选项所说,π值是圆周长和直径的比值,是一个无限不循环小数.A是错误的.3.14只是π的近似值.
英语:
1.选A
2.选A
3.选D
4.选D
5.选C
6.选C
7.LUCKY
8.easy
9.What an
10.American only couldn't speak by another writer
三楼真2,π都不知道还回答什么问题啊.
2.正如B选项所说,π值是圆周长和直径的比值,是一个无限不循环小数.A是错误的.3.14只是π的近似值.
英语:
1.选A
2.选A
3.选D
4.选D
5.选C
6.选C
7.LUCKY
8.easy
9.What an
10.American only couldn't speak by another writer
三楼真2,π都不知道还回答什么问题啊.
1.若一个扇形所在的圆心角缩小为原来的2分之1,半径扩大为原来的2倍.则它的面积扩大为原来的___倍.
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扇形的圆心角缩小为原来的1/3,半径扩大为原来的3倍,则扇形面积()
扇形的圆心角扩大到原来的2倍,半径缩小为原来的12
已知一个扇形的面积是100平方厘米,现将它的圆心角扩大为原来的2倍,而将它的半径缩小原来的2分之1.
已知一个扇形的面积是100平方厘米,现将它的圆心角扩大为原来的2倍,而将它的半径缩小原来的2分之1,
一个扇形的面积是100平方厘米,圆心角扩大为原来的2倍,半径缩小为原来的1/2,所得的扇形面积是多少?
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已知一个扇形的面积是100平方厘米,现将它的圆心角扩大为原来的2倍,而将它的半径缩小为原来的1/2,
一个扇形半径扩大原来的3倍,圆心角缩小为原来的一半,索得的扇形面积比原来增加70平方厘米,求原来的面积