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3.圆心为,且过点的圆的方程为

A.      B.

C.      D.

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2.函数的定义域为

A.        B.   

C.       D.

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1.设全集,集合

则图中的阴影部分表示的集合为

A.               B.

C.              D.

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20. The plan _____ just because people were unwilling to co-operate.

A. pulled downed       B. broke down          C. turned downed      D. put do

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19. After graduation from college, Joe ____ for a year seeing the country before he went to work in his father’s business.

A. knocked about      B. knocked over         C. knocked down      D. knocked off

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18. The hunter ____ down and ____ to the farmer that he had___ his gun against the tree.

A. lay, lied, laid        B. lay, laid, laid          C. laid, lay, lied        D. laid, lied, lay

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17. How did the accident_____________?  

A. come out          B. come along          C. come about        D. come across

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16. The boys arguing over whether to play baseball or football finally ___ by voting.

A. reached goals       B. came to terms        C. came to an end      D. gave up

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15. So many young men want to ___ writing.

A. take in            B. take up             C. take over          D. take off

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14. He is too tired and his strength has __________. A. run out            B. used up            C. given up           D. been run out

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