25. - So you know Della?
-Yes, it was last week _____ I surfed the Internet
A. that B. when C. why D. whom
24. Jane’s father has bought a nice sports car, _____ we all know it.
A. as B. which C. that D. and
23. I was speaking to Ann on the phone when suddenly we were _____.
A. hung up B. hung back C. cut down D. cut off
22. -Hello, Peter. Would you please go shopping with me after school?
-Sorry. Our school is a boarding school. In school days nobody _____ go out of school without the head teacher's permission.
A. will B. can C. may D. shall
第一节 单项填空(共15小题;每小题1分,满分15分)从每题所给的A、B、C、D四个选项中,选出可以填入空白处的最佳选择。并在答题卡上将该项涂黑。
21. I remember seeing this kind of _____ product in _____ city of Shanghai, which is known as _____ Paris of the East.
A. the; the; the B. /; the; the C. the; /; the D. the; a; /
22.(本题满分12分) 已知函数.
(Ⅰ) 求f –1(x);
(Ⅱ) 若数列{an}的首项为a1=1,(nÎN+),求{an}的通项公式an;
(Ⅲ) 设bn=(32n-8),求数列{bn}的前项和Tn .
21.(本题满分12分)已知函数f(x)=x3+ax2+bx+c,曲线y=f(x)在x=1处的切线不过第四象限且斜率为3,又坐标原点到切线
的距离为
,若x=
时,y=f(x)有极值.
(Ⅰ)求a、b、c的值;
(Ⅱ)求y=f(x)在[-3,1]上的最大值和最小值.
20.(本题满分12分) 已知数列{an}满足
(Ⅰ)求数列的前三项:a1,a2,a3;
(Ⅱ)求证:数列{}为等差数列.
(Ⅲ)求数列{an}的前n项和Sn.
19.(本题满分12分) 已知函数
(Ⅰ)当的 单调区间;
(Ⅱ)当的取值范围。
18. (本题满分12分)已知集合A=,
.
(Ⅰ) 当a=2时,求AB;
(Ⅱ) 求使BA的实数a的取值范围.
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