6.对于任意,函数的值恒大于零,那么的取值
范围是 ( )
A. B. C. D.
5.如图,是O在内部,且有,
则的面积与的面积比为 ( )
A.2 B.3
C.4 D.6
4.已知等差数列的前项和,若,且A、B、C三点共
线(O为该直线外一点),则 ( )
A.2009 B. C. D.
3.函数的反函数为 ( )
A.
B.
C.
D.
2.等差数列中,,公差,且、、恰好是某等比数列的前三项,
那么该等比数列的公比
A.2 B. C. D.4
1.的值为 ( )
A. B. C. D.
3.开头句子已给出。不计人句子总数。
Last week,we did research into how laid-off workers get their New jobs.
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Last week, we did research into how laid-off workers get their new jobs. Some students surfed the Internet and learned that most of the laid-off workers had already got their new jobs. The city government provided a vocational training center, where five courses for laid-off workers were offered. After training, they began working as repair workers, cooks, typists, household workers and salespersons. The other students interviewed some laid-off workers who had got new jobs. A woman said, "With The help of the government I've found my new job."
What a great deal we've learned through the research !
2.将5个句子组织成连贯的一篇短文,使用必要的连接词。
1.必须使用;个句子介绍全部所给的内容。
4.通过研究性学习.我们学到了更多。
[写作要求)
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