第一节 听下面5段对话,每段对话后有一个小题,从题中所给的A, B, C三个选项中选出最佳选项,并标在试卷的相应位置。每段对话仅读一遍。(共5小题,满分7.5分)
1. What will happen next?
A. Jack will go to the cinema with Mary.
B. Mary will watch VCD in English with Jack.
C. There is no need for Jack to go to the cinema.
2. What will the woman do if she wants to make use of her remote controls correctly?
A .She has to remember the different shape of her remote controls.
B. She has to know the differences between each remote controls.
C. She has to recognize the different colors of her remote controls.
3. How old is the woman’s bicycle?
A. Four years old. B. Five years old. C. Six years old.
4. Where does the dialogue probably happen?
A. In a library. B. In the countryside. C. On the football playground.
5. When can the book be borrowed from the library?
A. In June. B. In July. C. In September.
21、已知动圆过定点,且与直线相切.
(1)求动圆圆心M的轨迹;
(2)过定点作直线交轨迹于、两点,是点关于坐标原点O的对称点, 求证:.
瑞安中学2008学年第二学期高二年级期中考试
20、已知函数在处取得极值.
(1)求的值;
(2)当时,恒成立,求的取值范围.
19、已知命题:关于的方程有两个不相等的负根,命题:关于的方程无实根,若为真,为假,求实数的取值范围.
18、已知椭圆的焦点坐标为,离心率,为椭圆上一点.
(1)求椭圆的标准方程;(2)若,求
17、若函数的图像如右图
所示,则 .
16、要制作一个容积为96的圆柱形水池(无盖),已知池底的造价为30元/,水池侧面造价为20元/.如果不计其他费用,欲使建造的成本最低,则池底的半径应为 米.
15、若,,…,,,则= .
14、曲线在点处的切线与轴,直线所围成的三角形面积为 .
13、抛物线上到点距离的最小值为 .
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