23.( ) If you work hard, you’ll get ______ “A” in the exam.
A. a B. an C. the
22.( ) -Wow, what a nice MP4! Whose is it?
-My aunt bought it for my brother and me. It’s ______.
A. mine B. his C. ours
II.Multiple choice (本题共15分,每小题1分)
Choose the best answer from A, B or C according to the meaning of the sentence.
21.( ) -How many ______can you see in the picture?
-Only one.
A. dog B. sheep C. child
I. Listening (本题共20分,Part One、Part Two、Part Three、Part Four每小题1分)
Part One Choose the right picture according to what you hear.
|
1.________ 2.________ 3.________ 4. ________ 5. ________
Part Two Match the best choice from A to G according to what you hear.
( ) 6. Mike A. a photo album
( ) 7. Grace B. some flowers
( ) 8. Mum C. a pair of glasses
( ) 9. Dad D. CDs
( ) 10. Jeff E. a watch
F. a scarf
G. a big cake
Part Three Choose the right answer according to what you hear.
( ) 11. Ruth Becker traveled with her ________ in 1912.
A. friends B. neighbors C. family
12.( )They were on their way home to the ________.
A. USA B. UK C. UN
13.( )The famous ship Titanic was on its ________ time in the sea.
A. first B. second C. third
14.( ) The newspapers said the Titanic was like a _______.
A. room B. house C. palace
15.( ) Then on April 14, the weather turned _______.
A. hot B. cold C. warm
Part Four Complete the form according to what you hear.
Time: |
On(16)_________
15th |
Person: |
The
group(17)_________ |
Place:
|
At the
Star (18)________ |
What will
happen: |
They
will have a pop (19)________. |
What
for: |
To
(20)________money for the Qinghai Earthquake |
20. 已知中,
(1) 求角C;
(2) 设,是否存在实数,使得的最小值为,若存在,求出所有实数的值,若不存在,请说明理由.
19.已知,
(1)求的单调增区间;
(2)若,求的取值范围.
18. 已知是小于5的正实数,集合,
(1) 若是整数,是投掷一颗质地均匀的骰子正面向上的点数,求落在圆内的概率;
(2 ) 求使的概率.
17. 某农科所对冬季昼夜温差大小与某反季节大豆新品种发芽多少之间的关系进行分析研究,他们分别记录了12月1日至12月5日的每天昼夜温差与实验室每天每100颗种子中的发芽数,得到如下资料:
日期 |
12月1日 |
12月2日 |
12月3日[] |
12月4日 |
12月5日 |
温差x(oC) |
10 |
11 |
13 |
12 |
8 |
发芽数y(颗) |
23 |
25 |
30 |
26 |
16 |
该农科所确定的研究方案是:先从这5组数据中选取2组,用剩下的3组数据求线性回归方程,再对被选取的2组数据进行检验.[
(1)求选取的2组数据恰好是不相邻2天数据的概率;
(2)若选取的是12月1日与12月5日的两组数据,请根据12月2日至12月4日的数据,求出关于的线性回归方程;
(3)若由线性回归方程得到的估计数据与所选的检验数据的误差均不超过2颗,则认为得到的线性回归方程是可靠的,试问第(2)小题中所得到的线性回归方程是否可靠?
()
16. 已知函数.
(1)若,求函数的值;
(2)将函数的图象向右平移个单位,使平移后的图象关于原点对称,若,试求的值.
15. 已知,
(1)当与平行时,求的值;
(2)当与夹角为锐角时,求的范围.
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