25.It doesn’t make any sense for tbe Prime Minister to a banker to this post.
A.choose B.elect C.appoint D.select
24.一I’we heard that another brand of milk powder has been banned .
-It’s a shame that some companies lack the sense of social responsibility and .
A.consequence B.construction C.consideration D.conscience
23.一Why are you so excited,John?
-Our class got the first prize in the singing contest at last,which we forward to.
A.have been looking B.had been looking
C.looked D.had looked
22.一What did he want to know,John?
一 that we could finish our work.
A.What it was B.When was it C.When it was D.What was it
第一节: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。
21.Although everything seems to have been taken into consideration, accident can happen when the astronauts walk in space.
A.不填;the B.an;the C.the;the D.an;不填
22.(本题满分12分)
如图,已知直线与抛物线相切于点,且与轴交于点,为坐标原点,定点的坐标为
(1)若动点满足,求点的轨迹.
(2)若过的直线(斜率不等于0)与(1)中的轨迹的交于不同的两点(在之间),试求与面积之比的取值范围.
21.(本题满分12分)
设数列的前项和为,
(1)证明当时,是等比数列.
(2)求的通项公式.
20.(本题满分12分)
函数 在上[-1,1]是增函数.
(1)求实数的值的集合.
(2)设关于的方程的两根为,试问,是否存在实数,使得不等式对任意及恒成立,若存在,求出的取值范围.若不存在,说明理由.
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