9. It turned out to be a good harvest of wheat this year, ____ lack of rain.
A. regardless of B. in spit C. due to D. in case
8. ---Excuse me, Sir, could you tell me how to go to the railway station?
---Sorry, you’d better ask, I’m afraid, ____ is a native.
A. whom B. who C. whomever D. whoever
7. China’s first compulsory safety regulation on primary buses, which requires every seat to have a seat belt, will ____ on July 1.
A. have an effect B. take effect C. bring into effect D. come to effect
6. With smart phones taking the world by ____ storm, a phone that can only send and receive voice calls and text messages may seem like ____ relic.
A. a; a B. the; 不填 C. the;a D. 不填; a
第一节 语音知识(共5小题;每小题1分,满分5分) 从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项,并在答题卡上将该项涂黑。
例:have A. gave B. save C. hat D. made
答案是C。
1. height A. receive B. seize C. eight D. either
2. refer A. offer B. conversation C. service D. concert
3. society A. diet B. receive C. belief D. friend
4. clothes A. cloth B. mouths C. worth D. breath
5. shoot A. foot B. look C. boot D. took
第二节 语法和词汇知识(共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
例:We ______ last night, but we went to the concert instead.
A. must have studied B. might study
C. should have studied D. would study
答案是C。
24.选修4-5:不等式选讲
(1)已知实数
(2)利用(1)的结论,求函数(其中)的最小值.
23.选修4-4:坐标系与参数方程
已知曲线C的极坐标方程 是=1,以极点为原点,极轴为轴的正半轴建立平面直角坐标系,直线的参数方程为为参数)。
(1)写出直线与曲线C的直角坐标方程;
(2)设曲线C经过伸缩变换得到曲线,设曲线上任一点为,求的最小值。
22.选修4-1:几何证明选讲
如图,是边长为的正方形,以为圆心,为半径的圆弧与以为直径的半圆O交于点,延长交于.
(1)求证:是的中点;
(2)求线段的长.
21.(本小题满分12分)
在平面直角坐标系xOy中,已知三点A(-1,0),B(1,0),,以A、B为焦点的椭圆经过点C。
(I)求椭圆的方程;
(II)设点D(0,1),是否存在不平行于x轴的直线与椭圆交于不同两点M、N,使?若存在,求出直线斜率的取值范围;若不存在,请说明理由;
(III)对于y轴上的点P(0,n),存在不平行于x轴的直线与椭圆交于不同两点M、N,使,试求实数n的取值范围。
20.(本小题满分12分)
已知函数
(I)若,判断函数在定义域内的单调性;
(II)若函数在内存在极值,求实数m的取值范围。
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