3．曲线在点处的切线与轴、直线所围成的三角形的面积为(　　 )

A．　　　　　　　 B．　　　　　　　　 C．　　　　　　　　 D．

答案：C

2．已知函数在处有极值，则该函数的一个递增区间是(　　 )

A．　　　　　　　　　 B．　　　　　　 C．　　　　　 D．

答案：B

1．函数的导数(　　 )

A．　　　　　　　 B．　　　　　　 C．　　　　　　　 D．

答案：D

The woman often called the First Lady of New York died in August.Brooke Astor was one hundred and five years old.The extremely wealthy and famous New Yorker spent much of her life 　1　 (help)the needy in her beloved city.She was born in Portsmouth,New Hampshire.She was the only child of a high level military officer.After two earlier　 2　 ,she married Vincent Astor in 1953 again.He came from a family　 3　 had been rich for at least one hundred years.Among other things,he owned many buildings in New York City.Brooke Astor became one of the 　4　 (rich)women in the world when Vincent Astor died.She also became head of a huge charity organization　 5　 (found)by her husband.He reportedly had told her she would have fun giving 　6　 his money.And apparently she did.Missus Astor gave tens of millions of dollars 　7　 (main)to places and people in New York City.She said it was the sensible choice because that was 　8　 the money had been made.She gave financial support to the city?s cultural centers,its poor and disabled as　 9　 　as to many other smaller charities.When she died，the mayor of New York said the city would not be what it is today 10　 her support.　

17．2010年世界博览会在中国上海市举行，也是历来首次由中国举办的世界博览会。某中学某班将召开以“我心中的世博”为主题的班会，请你以主持人的身份将下面这段开场白补充完整，要求紧扣主题．语言简明得体．至少运用两种修辞，50字左右。(4分)