25. fresh air,people may start to feel sick.So make sure you open the windows while working.
A.For the absence of B.In the absence of
C.In the honor of D.In the short of
24.-Tom is said to have been accused of mismanagement.
-It’s not fair.I don’t think him the person for what happened.
A.to be blamed B.to blame
C.blamed D.blame
23.In the character-training of children,what really much is what their parents
say and do.
A.matters B.concerns C.cares D.minds
22.In face of failure,we should keep up good state of mind instead of being depressed.
A./;the B.a(chǎn);the C.the;a D./;a
第一節(jié):從下面每個句子后面所給的A、B、C、D四個選項中選出一個最佳答案。(共15小題,每小題1分,計15分)
21. your worries with the friend you trust,-you will feel relieved.
A.Share B.To share
C.Sharing D.Having shared
20、已知函數(shù)和點,過點作曲線的兩條切線、,切點分別為、.
(Ⅰ)設,試求函數(shù)的表達式;
(Ⅱ)是否存在,使得、與三點共線.若存在,求出的值;若不存在,請說明理由.
(Ⅲ)在(Ⅰ)的條件下,若對任意的正整數(shù),在區(qū)間內(nèi)總存在個實數(shù),,使得不等式成立,求的最大值.
19、設函數(shù)
.對于正項數(shù)列,其前
(1)求實數(shù) (2)求數(shù)列的通項公式
(3)若大小,并說明理由。
18、將函數(shù)在區(qū)間內(nèi)的全部極值點按從小到大的順序排成數(shù)列,.
(Ⅰ)求數(shù)列的通項公式;
(Ⅱ)設,求證:,.
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