1.选择题- (共13题)
4.如图,已知F1、F2是椭圆G: {#mathml#}{#/mathml#} 的左、右焦点,直线l:y=k(x+1)经过左焦点F1,且与椭圆G交于A、B两点,△ABF2的周长为 {#mathml#}{#/mathml#} .
(Ⅰ)求椭圆G的标准方程;
(Ⅱ)是否存在直线l,使得△ABF2为等腰直角三角形?若存在,求出直线l的方程;若不存在,请说明理由.
5.如图,已知F1、F2是椭圆G: {#mathml#}{#/mathml#} 的左、右焦点,直线l:y=k(x+1)经过左焦点F1,且与椭圆G交于A、B两点,△ABF2的周长为 {#mathml#}{#/mathml#} .
(Ⅰ)求椭圆G的标准方程;
(Ⅱ)是否存在直线l,使得△ABF2为等腰直角三角形?若存在,求出直线l的方程;若不存在,请说明理由.
6.如图,点P在平面上从点A出发,依次按照点B、C、D、E、F、A的顺序运动,其轨迹为两段半径为1的圆弧和四条长度为1,且与坐标轴平行的线段.设从运动开始射线OA旋转到射线OP时的旋转角为α.若点P的纵坐标y关于α的函数为f(α),则函数f(α)的图象( )
10.某人第一天8:00从A地开车出发,6小时后到达B地,第二天8:00从B地出发,沿原路6小时后返回A地.则在此过程中,以下说法中
①一定存在某个位置E,两天经过此地的时刻相同
②一定存在某个时刻,两天中在此刻的速度相同
③一定存在某一段路程EF(不含A、B),两天在此段内的平均速度相同.(以上速度不考虑方向)
正确说法的序号是{#blank#}1{#/blank#}.
11.某人第一天8:00从A地开车出发,6小时后到达B地,第二天8:00从B地出发,沿原路6小时后返回A地.则在此过程中,以下说法中
①一定存在某个位置E,两天经过此地的时刻相同
②一定存在某个时刻,两天中在此刻的速度相同
③一定存在某一段路程EF(不含A、B),两天在此段内的平均速度相同.(以上速度不考虑方向)
正确说法的序号是{#blank#}1{#/blank#}.
2.单项选择- (共12题)
14.
I've achieved a lot in my study, thanks to ____ who helped me.
A.others | B.those | C.ones | D.these |
15.
-It will be cool to have______ summer drink in the heatwave.
-Sounds good!Let's try _____ great enjoyment.
-Sounds good!Let's try _____ great enjoyment.
A.不填; a | B.a; the | C.a;不填 | D.the; a |
16.
-Will the book I ordered arrive in time?
-lt _______, if there is no traffic jam.
-lt _______, if there is no traffic jam.
A.must | B.can | C.should | D.would |
17.
With the computer’s system _________, it can’t be used at the moment.
A.updating | B.being updated |
C.updated | D.to update |
18.
The presents ______ on my birthday moved me a lot.
A.received | B.were received | C.receiving | D.to receive |
19.
The dress is very nice, but not ______ the girl's taste, for she is somehow particular.
A.for | B.with | C.by | D.to |
20.
. -Did you get ro the village before the sun set?
-No. It was already midnight. My bike ____ on the way.
-No. It was already midnight. My bike ____ on the way.
A.has broken | B.was breaking | C.breaks | D.broke |
21.
A good friend is a person________we tum for help when we are in trouble.
A.who | B.whom |
C.to whom | D.to which |
22.
It was almost eight years Iater _____ the young man got his doctor's degree and became an engineer.
A.since | B.when | C.before | D.that |
23.
Lily managed to accomplish ______ the teacher encouraged her to do.
A.that | B.what | C.which | D.whether |
试卷分析
-
【1】题量占比
选择题:(13道)
单项选择:(12道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:11
7星难题:0
8星难题:0
9星难题:0