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已知a+b=2,ab=﹣1,则a2+b2=____ 

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6

同类题1

下图所示范围从东到西自然景观的变化,属于    (   )

同类题2


同类题3

阅读与回答问题。

    Charles Dickens was born in one of the small towns in England.

    When Dickens was nine years old, his father found a job in London and the family moved there. Later on his father was put in to prison(监狱)for owing(负债). His mother could not supply(供应) enough food to him and his younger brothers and sisters. He had to do something for his family, so he could not go to school.  

    Only until his father was out of prison, Charles could go to school. At that time he was already twelve. But he did not finish school. Two years later he began to work in a factory.

    And at first he was a journalist(记者)and wrote for newspapers. The future writer often went to the library to read books. He read a lot. Then, at the age of twenty-two, Dickens began to write and he wrote a lot of novels and stories all his life.Dickens died over a hundred years ago,but people are still reading his books with great interest.

同类题4

不等式≥0的解集是(   )

同类题5

我会分辨同音字。

liàng

wéi

xiàn

píng

原____

____护

____制

____借

清____

____一

____慕

____比

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