58．According to the second paragraph，the study has discovered that ____　 _ ．

A．emphasis of teaching is on problem solving and reasoning

B．curriculum is good for national standardized tests

C．the tests mainly center around the memorization of some formulas

D．routine formulas are not useful for students to memorize

57．It can be inferred that in high minority classrooms ____　 _ ．

A．the students can not get high score from the tests

B．scores from the tests are not important

C．instructional emphases are unfavourable

D．teaching doesn't focus on the quality of education

56．The author of this article states that ____　 _ ．

A．the tests don't affect teaching in most elementary and high schools

B．the science and math teaching is influenced by the present tests

C．no study is performed on tests for the National Science Foundation

D．the United States exerts a strong influence on science and math teaching

15、在平面直角坐标系中，已知圆和圆.若直线过点，且被圆截得的弦长为，求直线的方程；

江苏省沭阳高级中学2010届高三(文)寒假作业

14、如图，在四棱锥中，面平分为的中点.

(1) 证明：∥面；(2) 证明：面面.

13、已知函数()在处取最小值.　　

(1) 求的值；(2) 在中，分别为角的对边，已知，求角.

12、用表示三个数中的最小值。设函数，则函数的值域为　　　　　　　　　　 .

11、对于四面体，下列命题正确的是　　　　 (写出所有正确命题).①相对棱与所在直线是异面直线；②由顶点作四面体的高，其垂足是的垂心(即三角形三条高的交点)；③若，则；④任何三个面的面积之和都大于第四个面的面积；⑤分别作三组对棱中点的连线，所得的三条线段相交于一点.

10、有下面算法：

则运行后输出的结果是　　　　　　　　　　 .

9、设斜率为的直线过抛物线()的焦点，且和轴交于点，若(为坐标原点)的面积为，则抛物线的方程为　　　　　　　　　　　 .