25.---How does the girl we met just now strike you?
---She is but beautiful.
A.anything B.anybody C.everything D.everybody
24.The whole team were wild with joy when their captain top in the race.
A.came up B.came out C.turned up D.went out
23.---It is said we may have got the result of the exam by the end of next month, won’t we?
---Sure. .You’ll be informed in time.
A.With pleasure B.No wonder C.It doesn’t matter D.Take your time
22.---Was your holiday trip to Europe amazing?
---Not really! But we got back safe, before the European airspace restriction caused by the Icelandic volcano ashes.
A.narrowly B.successfully C.smoothly D.thankfully
第一节:单项填空(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. Haitian man, according to his family, has survived four weeks under ruins since
destructive earthquake this January.
A.The; a B.The;/ C.A;/ D.A; the
12. 由于,,,所以.故.
又平面平面,平面平面,平面,
所以平面,又平面,故平面平面.
(Ⅱ)解:过作交于,由于平面平面,
所以平面.因此为四棱锥的高,
又是边长为4的等边三角形.因此.
在底面四边形中,,,
所以四边形是梯形,在中,斜边边上的高为,
此即为梯形的高,所以四边形的面积为.
故.
11. 解:(1)是奇函数时,,即对任意实数成立.
化简整理得,这是关于的恒等式,所以
所以(舍)或 .
(3)(理),因为,所以,,从而;而对任何实数成立;所以对任何实数、c都有成立.
10. 解:(Ⅰ)
.
因为为偶函数,所以对,恒成立,因此.
即,
整理得.
因为,且,所以.又因为,故.
所以.由题意得,所以.故.
因此.
(Ⅱ)将的图象向右平移个单位后,得到的图象,再将所得图象横坐标伸长到原来的4倍,纵坐标不变,得到的图象.所以.
当(),即()时,单调递减,
因此的单调递减区间为().
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