5.(08年上海市部分重点中学高三联考6)已知圆的半径为2,圆心在轴的正半轴上,且圆与直线3+ 4+4 = 0相切,则圆的标准方程是_______________________
答案:
1(2008学年度第一学期上海市普陀区高三年级质量调研第5题) 已知两直线方程分别为、,若,则直线的一个法向量为 . 答案:
4.(上海市八校2008学年第一学期高三数学考试试卷10)函数的图象恒过定点A,若点A在直线上,其中,则的最小值为 .
答案:
3.(上海市高考模拟试题8)曲线的长度是 .
答案:
2.(上海市宝山区2008学年高三年级第一次质量调研12)如图,在平面斜坐标系中中,,平面上任一点的斜坐标定义如下:若,其中分别为与轴,轴同方向的单位向量,则点的斜坐标为.
那么,以为圆心,为半径的圆有斜坐标系中的方程是__________.
答案:
1.(上海市宝山区2008学年高三年级第一次质量调研4)设为圆的动点,则点到直线的距离的最小值为_________.
答案:1
1.( 2009年上海市普通高等学校春季招生考试13)过点与圆相交的所有直线中,被圆截得的弦最长时的直线
方程是 [答] ( )
(A). (B). (C). (D).
答案:C
1(上海市青浦区2008学年高三年级第一次质量调研第15题)已知两点,若直线上存在点,
使,则称该直线为“型直线”.给出下列直线:
①;②;③;④,其中为“型直线”的是( )
A.①② B.①③ C. ①④ D. ③④
答案:A
95. Many people swarmed into big cities to seek their __________ , but most of them failed.
A. money B. earnings
C salary D. fortune
96 I could tell that the teacher was satisfied with our recent examinations from the____on his face.
A. view B. expression
C. appearance D. sight
97The archaeologists ___________ the ancient caves.
A. observed B. watched
C. explored D. exploited
98He always __________ a piece of chewing gum when he does his homework.
A. eats B. swallows
C. bites D. chews
99Is $ 10____ for the expenses of your journey?
A. sufficient B. efficient
C. satisfactory D. effective
100The first performance of the musical play “The Sound of Music” aroused____in audience.
A. affection B. Importance
C. enthusiasm D. Influence
94. If you want to know the train schedule, you can __________ at the booking office.
A. require B. demand
C. acquire D. inquire
93. The collapse of the World Trade Center has put US economy in a difficult __________
A. occasion B. case
C. situation D. background
92. To regain their after a long walk ,the tourists lay in the grass for nearly half an hour.
A. force B. power
C. energy D. health
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