7.What is the woman’s seat number? A.6A. B.7A. C.8A. 听第7段材料,回答第8、9题。 8.Why doesn’t the woman take the green T-shirt? A.It's too small. B.It’s too dark. C.It’s too expensive 9.What does the woman buy in the end? A.A yellow T-shirt. B.A blue T-shirt. C.A pink T-shirt. 听第8段材料,回答第10至12题。 10.How long has the man been in London? A.One year. B.A few years. C.A couple of months. 11.Why did the woman leave her hometown? A.To lead a city life. B.To open a restaurant. C.To find a job. 12.Where did the woman come from? A.London. B.Airside. C.Lancaster. 听第9段材料,回答第13至16题。 13.What is a daypack? A.A box. B.A bag. C.A lock. 14.What surprises the girl at school? A.A lot of discussions in class. B.Teachers giving little homework. C.Few students asking questions in class. 15.At what time of the school term does the conversation most probably take place? A.At the end of it. B.In the middle of it. C.At the beginning of it. 16.What do we know about the girl? A.She is new to the school. B.She writes for the school newspaper. C.She seldom asks questions in class. 听第10段材料,回答第17至20题。 17.What does Mr. Henry Stone do? A.A bank clerk. B.A teacher. C.A writer. 18.What does Henry like doing at airports? A.Watching people. B.Telling stories. C.Reading magazines. 19.What did Henry learn from the newspaper that day? A.A valuable suitcase was missing. B.A man stole money from a bank.
C.A woman ran away from home. 20.Why was the woman at the airport? A.She was traveling on business. B.She was seeing the man off.
C.She was leaving for Greece.
C.Cathy is going to be invited.
4.Why does the woman plan to go to town? A.To pay her bills in the bank. B.To buy books in a bookstore.
C.To get some money from the bank. 5.What is the woman trying to do? A.Finish some writing. B.Print an article. C.Find a newspaper. 第二节(共15小题;每小题1.5分,满分22.5分) 听第6段材料,回答第6、7题。 6.What is the man doing? A.Changing seats on the plane. B.Asking for a window seat.
C.Trying to find his seat.
22.已知函数,
(1)设两曲线与有公共点,且在公共点处的切线相同,若,试建立关于的函数关系式,并求的最大值;
(2)若在(0,4)上为单调函数,求的取值范围.
21.某地需要修建一条大型输油管道通过120公里宽的沙漠地带,该段输油管道两端的输油站已建好,余下工程只需要在该段两端已建好的输油站之间铺设输油管道和等距离修建增压站(又称泵站).经预算,修建一个增压站的工程费用为432万元,铺设距离为公里的相邻两增压站之间的输油管道费用为万元.设余下工程的总费用为万元.
(Ⅰ)试将表示成关于的函数;
(Ⅱ)需要修建多少个增压站才能使最小?
20.已知函数是定义在(-1,1)上的奇函数,且。
(1)试求出函数的解析式;
(2)证明函数在定义域内是单调增函数。
19.已知:命题p:x1和x2是方程x2-mx-2=0的两个实根,
且不等式a2-5a-3≥|x1-x2|对任意实数m∈[-1,1]恒成立;
命题q:函数y=lg(ax2-x+a)的定义域为R.
若命题p是假命题,命题q是真命题,求a的取值范围.
18.(1)判断函数奇偶性,并给出证明;
(2)求函数的值域。
17.给出以下命题,其中正确命题序号为 。
a、若函数y=f(x)为偶函数,则函数y=f (x-1)的图像关于直线x=1 对称;
b、“”是“”的充分不必要条件;
c、函数y=的反函数为其中x>-1;
d、已知是函数的导函数,若=0,则必为函数的极值点;
e、某城市现有人口a万人,预计人口年平均增长率为p。那么该城市第十年年初的人口总数为万人
三、解答题:(共74分,解答应写出文字说明,证明过程或演算步骤)
16.已知,则的值为
15.已知奇函数是定义在上的增函数,如果,则实数的取值范围是
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