25. In fact, Picasso abandoned the old style of painting and starting from scratch, ________a style of art known as cubism.
A. to create B. creating C. created D. having created
24. Just on the surface of the pond ________, giving people a feeling of being peaceful.
A. floated hundreds of lotus plants B. did hundreds of lotus plants float
C. hundreds of lotus plants were floating D. hundreds of lotus plants floated
23. Last week the professor delivered a speech, over half of which was ________ to the issue of unemployment.
A. exhibited B. spent C. admitted D. devoted
22. ---Shall we go to the exhibition or to the concert?
---________.
A. It’s your opinion B. I don’t mind
C. That’s your decision D. It’s all up to you
第一節(jié): 單項(xiàng)填空(共15小題;每小題1分,滿(mǎn)分15分) 從A、B、C、D四個(gè)選項(xiàng)中,選出可以填入空白處的最佳選項(xiàng)。
21. In 1970, Kate, ________small British child, performed on ________stage for the first time.
A. the ; a B. a ; / C. a ; the D. the ; the
20、(本題16分)已知函數(shù)![]()
(1)試求
所滿(mǎn)足的關(guān)系式;
(2)若
,
在
為增函數(shù),求
的取值范圍。
(3)若
,方程
在
有唯一解,求a的取值范圍;
19、(本題16分)如圖,寬為
的走廊與另一寬為b的走廊垂直相連,設(shè)細(xì)桿AC的長(zhǎng)為
,
![]()
(1)試用
表示
;
![]()
(2)當(dāng)
時(shí),求當(dāng)細(xì)桿AC能水平通過(guò)拐角時(shí)
的最大值;
(3)當(dāng)
=8a時(shí),問(wèn)細(xì)桿AC能水平通過(guò)拐角,則另一走廊寬b至少是多少?
18.(本題15分)已知函數(shù)
(
).
(1)若
的定義域和值域均是
,求實(shí)數(shù)
的值;
(2)若
在區(qū)間
上是減函數(shù),且對(duì)任意的
,![]()
,總有
,求實(shí)數(shù)
的取值范圍.
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