14.Equipped with modern facilities, today’s libraries differ greatly from ____.
A.the past one B.the past
C.which of the past D.those of the past
13.--- I hear Robert has gone to Harvard University for his master’s degree.
--- Oh, how nice! Do you know when he ____?
A.was leaving B.left C.had left D.has left
12.--- Oh, must you? Stay a bit longer.____.
--- Thanks anyway.I’ve got an early start tomorrow morning.
A.It’s been such fun having you.
B.Maybe you can have supper here.
C.We welcome you with open arms.
D.Let’s have another chat.
11. It’s reported that a bus went out of ____ control on a highway ____ east of the city and crashed into a river.
A.the; the B./; / C.the; / D./; the
第二节: 情景对话 (共5小题,每小题1分,满分5分)
根据对话内容,从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Jane: Oh, that's Mr.Taylor.He is so boring.
Mother: What do you mean?
Jane: 6 And he's so quick tempered, mum.
Mother: 7 Are you sure, darling?
Jane: Yes, he gets angry very quickly.
Mother : 8
Jane: And do you know, he spends all his time looking at his reflection in the window, admiring himself.
Mother : Really? 9
Jane: Because he is vain, that's why! And conceited (自负的).He thinks he knows everything.
Mother: Oh, Jane.Be reasonable.I'm sure you're exaggerating (夸张), Mr.Taylor seems such a nice and kind man.
Jane: 10 He's mean (小气的) and cruel.
Mother: Cruel? Now how can a history teacher be cruel?
Jane: Because he only gave me two out of ten marks in my history test.
Mother: Oh, now I understand, Jane.I think you'd better get on with your homework.
A.Well, he isn't.
B.And why does he do it ?
C.His lessons send me to sleep.
D.That's doesn't sound like Mr.Taylor at all.
E.Quick tempered? Mr.Taylor ?
F.Yes, he does.
G.He doesn’t like me.
第三节 语法和词汇知识 (共15小题,每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
第一节 语音知识(共5小题, 每小题1分,满分5分)
从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项。
![]()
21. (本小题满分13分)
解:(I)
………
…………………………………………………1分
据题意,
,
…………………………………………………………………3分
依题意可画出函数
草图,得
当
或
时,方程有一解;
当
或
时,方程有两解;
当
时,方程有三解.……………………………………………………14分
19. (本小题满
分12分)![]()
解:(Ⅰ)由已知,对任意
,有
,
取
,得
.
所以数列{
}、{
}分别为等比、等差数列.
![]()
,
.……………………………………………………4
分
(Ⅱ)
,
.
两式相减,并化简得
. …………………………………8分[来
(Ⅲ)由
,得
. …………………………………10分
![]()
.
由![]()
得
(其中判别式
).
∴
, ①
. ② …………………………………………………………8分
设
,则
.
由
,得
. ③
由①②③,解得
.……………………………………………………………12分
所以,
.…………………………………………………………………………13分
18. (本小题满分12分)
解:(Ⅰ)连结
.
面
,
为
在平面
内的射影.
又
,
.……………………………………………………………………………
3分
(I
I)取D1C1中点M,连结PM,CM,则PM∥A1D1,
∵A1D1⊥平面D1DCC1,∴PM⊥平面D1DCC1,
∴CM为PC在平面D1DCC1内的射影.
则∠PCM为PC与平面D1DCC1所成的角.……………………………………………5分
在Rt△PCM中,
,
∴PC与平面D1DCC1所成的角的正弦值为
…………………………………………7分
(III)在正方体AC1中,D1D∥C1C.
∵C1C
平面D1DP内,
∴C1C∥平面D1DP.
∴点C到平面
D1DP的距离与点C1到平面D1DP的距离相等.
又D1D⊥平面A1B1C1
D1,DD1
平面D1DP,
∴平面D1DP⊥平面A1B
1C1D1,又平面D1DP∩平面A1B1C1D1=D1P,
过C1作C1H⊥D1P于H,则C1H⊥平面D1DP.
∴C1H的长为点C1到平面D1DP的距离.……
…………………………………………10分
连结C1P,并在D1C1上取点Q,使PQ∥B1C1.
在△D1PC1中,C1H·D1P=PQ·D1C1,得![]()
∴点C到平面D1DP的距离为
……………………………………………………12分
解法二:(I)如图,以D为坐标原点,建立空间直角坐标系D-xyz.
由题设知正方体棱长为4,则D(0,0,0),
A(4,0,0),B1(4,4,4),A1(4,0,4)D1(0,0,4),
C(0,4,0).…………………………………………………1分
设
,则
.
,
………………………………………………………………………………3分
(II)由题设可得,P
(4,2,4),故
.
∵AD⊥平面D1DCC1,
是平面D1DCC1的法向量.…………………5分
![]()
17. (本小题满分12分)
解:(Ⅰ)记甲、乙、丙分别答对此题为事件A、B、C.
由已知,P(A)=
,[1-P(A)][1-P(C)]=
,
P(C)=
.………………………………………………………………………………3分
又P(B)P(C)=
,
P(B)=
.………………………………………………………………………………6分
(Ⅱ)该单位代表队答对此题的概率P=1-(1-
)(1-
)(1-
)=
.……………12分
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