下列说法正确的是( ) A.-5是-25的平方根 B.3是(-3)2的算术平方根

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问题:

下列说法正确的是(  )

A.-5是-25的平方根

B.3是(-3)2的算术平方根

C.(-2)2的平方根是2

D.8的平方根是±4

考点:平方根算术平方根
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Look at the picture. What can you see? In the picture there is a big table with a lot of things on it. There are three bottles of orange juice, two glasses of milk, some bread, cakes and so on. look, there is a cat under the table. It’s Kate’s cat. Its name is Mimi. I think it like them very much. No, Mimi. You can’t have them. All the things on the table are not for you. They are for Jim and Kate. They have them for lunch. POLLY is a bird.  Now it’s on the window. It’s eating a banana.

小题1: There is a big table with ________ on it.

A.many things

B.three bottles of orange

C.two glasses of milk

D.some bread and cakes小题2:Where is the cat? It’s _________.

A.behind the door

B.under the table

C.near the window

D.on the floor小题3:What’s the name of Kate’s cat?

A.Mimi

B.Polly

C.Xiao Mi

D.Mary小题4:All the things on the table are for __________

A.Jim and Kate

B.Jim and Mimi

C.Jim and his father

D.Kate and her mother小题5:Which sentence is right ?

A.The cat is eating bread .

B.Jim is having breakfast.

C.Polly is eating a banana.

D.Kate is having lunch.

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分析日本明治维新后,近代学前教育制度的确立过程。

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对任意整数A、B,规定A*B=2(A+B),则(2*3)*4=().

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铁盐()

A.在盐酸酸性条件下检查

B.在硝酸酸性条件下检查

C.在醋酸盐缓冲液(pH3.5)中检查

D.在硫酸酸性条件下检查

E.在磷酸盐缓冲液(pH6.8)中检查

题型:选择题

绝缘()与绝缘()是10kV配电带电作业的一项重要安全防护措施。

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