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8.設是展開式的中間項.若在區間上恒成立.則實數的取值范圍是 查看更多

 

題目列表(包括答案和解析)

漢譯英。
1. 據報道,那種疾病已經在全市擴散開來。(spread) 
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2. 我們都知道他不誠實。(it's known to sb.)
    _________________________________________________________________
3. 說實話,他是個靠得住的人。(depend on) 
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4. 眾所周知,污染的空氣和水對我們的身體是有害的。(harmful)
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5. 他們在月球上的感覺和在地球上聽說的完全不一樣。(be different from)
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根據情景對話和內容,從對話后所給的選項中選出能填入空白處的最佳選項,并在答題卡上將該選項涂黑。注意:若選E為答案是,則在答題卡上選涂A和B兩選;若選F為答案時,則在答題卡上選涂A和C兩項;若選G為答案時,則在答題卡上選涂A和D兩項。

---Hello. Can I speak to Wu Min, please?

---______6_______

---Hello, Wu Min. This is Wang Hong. Sorry to ring you so late in the evening, but I’ve only just got home.

---______7______ What can I do for you?

---I’d like to ask you about some stamps. Do you still have the cock year stamp? You had it when I last saw you.

---I’m afraid I don’t have it. I sold it last week.

---_____8_______

---I’m sorry. I didn’t know you wanted it. ____9______

---Yes, please. Thank you. It’s very kind of you.

---______10_______

---Thank you very much.

---Bye-bye.

A.Do you like collecting stamps so much?

B.That’s all right.

C.Sorry, Wu Min is out.

D.Do you want me to find one for you?

E.Oh, what a pity!

F.Yes, speaking.

G.OK, I’ll ring you if I have any news.

 

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  根據情景對話和內容,從對話后所給的選項中選出能填入空白處的最佳選項,并在答題卡上將該選項涂黑。注意:若選E為答案是,則在答題卡上選涂A和B兩選;若選F為答案時,則在答題卡上選涂A和C兩項;若選G為答案時,則在答題卡上選涂A和D兩項。

---Hello. Can I speak to Wu Min, please?

---_____1._______

---Hello, Wu Min. This is Wang Hong. Sorry to ring you so late in the evening, but I’ve only just got home.

---_____2.______ What can I do for you?

---I’d like to ask you about some stamps. Do you still have the cock year stamp? You had it when I last saw you.

---I’m afraid I don’t have it. I sold it last week.

---____3.______

---I’m sorry. I didn’t know you wanted it. __4._____

---Yes, please. Thank you. It’s very kind of you.

---____5.______

---Thank you very much.

---Bye-bye.

A.   Do you like collecting stamps so much

B.   That’s all right.

C.   Sorry, Wu Min is out.

D.   Do you want me to find one for you?

E.   Oh, what a pity!

F.   Yes, speaking.

G.   OK, I’ll ring you if I have any news.

 

查看答案和解析>>

 根據情景對話和內容,從對話后所給的選項中選出能填入空白處的最佳選項,并在答題卡上將該選項涂黑。注意:若選E為答案是,則在答題卡上選涂A和B兩選;若選F為答案時,則在答題卡上選涂A和C兩項;若選G為答案時,則在答題卡上選涂A和D兩項。

---Hello. Can I speak to Wu Min, please?

---______6_______

---Hello, Wu Min. This is Wang Hong. Sorry to ring you so late in the evening, but I’ve only just got home.

---______7______ What can I do for you?

---I’d like to ask you about some stamps. Do you still have the cock year stamp? You had it when I last saw you.

---I’m afraid I don’t have it. I sold it last week.

---_____8_______

---I’m sorry. I didn’t know you wanted it. ____9______

---Yes, please. Thank you. It’s very kind of you.

---______10_______

---Thank you very much.

---Bye-bye.

A.Do you like collecting stamps so much?

B.That’s all right.

C.Sorry, Wu Min is out.

D.Do you want me to find one for you?

E.Oh, what a pity!

F.Yes, speaking.

G.OK, I’ll ring you if I have any news.

查看答案和解析>>

 根據情景對話和內容,從對話后所給的選項中選出能填入空白處的最佳選項,并在答題卡上將該選項涂黑。注意:若選E為答案是,則在答題卡上選涂A和B兩選;若選F為答案時,則在答題卡上選涂A和C兩項;若選G為答案時,則在答題卡上選涂A和D兩項。

---Hello. Can I speak to Wu Min, please?

---______6_______

---Hello, Wu Min. This is Wang Hong. Sorry to ring you so late in the evening, but I’ve only just got home.

---______7______ What can I do for you?

---I’d like to ask you about some stamps. Do you still have the cock year stamp? You had it when I last saw you.

---I’m afraid I don’t have it. I sold it last week.

---_____8_______

---I’m sorry. I didn’t know you wanted it. ____9______

---Yes, please. Thank you. It’s very kind of you.

---______10_______

---Thank you very much.

---Bye-bye.

A.Do you like collecting stamps so much?

B.That’s all right.

C.Sorry, Wu Min is out.

D.Do you want me to find one for you?

E.Oh, what a pity!

F.Yes, speaking.

G.OK, I’ll ring you if I have any news.

查看答案和解析>>

1.解析:,故選A。

2.解析:抽取回族學生人數是,故選B。

3.解析:由,得,此時,所以,,故選C。

4.解析:∵,∴,∴,故選C。

5.解析:設公差為,由題意得,,解得,故選C。

6.解析:∵雙曲線的右焦點到一條漸近線的距離等于焦距的,∴,又∵,∴,∴雙曲線的漸近線方程是,故選D.

7.解析:∵為正實數,∴,∴;由均值不等式得恒成立,,故②不恒成立,又因為函數是增函數,∴,故恒成立的不等式是①③④。故選C.

8.解析:∵,∴在區間上恒成立,即在區間上恒成立,∴,故選D。

9.解析:∵

,∴此函數的最小正周期是,故選C。

10.解析:如圖,∵正三角形的邊長為,∴,∴,又∵,∴,故選D。

11.解析:∵在區間上是增函數且,∴其反函數在區間上是增函數,∴,故選A

12.解析:如圖,①當時,圓面被分成2塊,涂色方法有20種;②當時,圓面被分成3塊,涂色方法有60種;

③當時,圓面被分成4塊,涂色方法有120種,所以m的取值范圍是,故選A。

13.解析:將代入結果為,∴時,表示直線右側區域,反之,若表示直線右側區域,則,∴是充分不必要條件。

學科網(Zxxk.Com)14.解析:∵,∴時,,又時,滿足上式,因此,

學科網(Zxxk.Com)15.解析:設正四面體的棱長為,連,取的中點,連,∵的中點,∴,∴或其補角為所成角,∵,∴,∴,又∵,∴,∴所成角的余弦值為

學科網(Zxxk.Com)16.解析:∵,∴,∵點的準線與軸的交點,由向量的加法法則及拋物線的對稱性可知,點為拋物線上關于軸對稱的兩點且做出圖形如右圖,其中為點到準線的距離,四邊形為菱形,∴,∴,∴,∴,∴,∴向量的夾角為

17.(10分)解析:(Ⅰ)由正弦定理得,,…2分

,………4分

(Ⅱ)∵,∴,∴,………………………6分

又∵,∴,∴,………………………8分

。………………………10分

18.解析:(Ⅰ)∵,∴;……………………理3文4分

(Ⅱ)∵三科會考不合格的概率均為,∴學生甲不能拿到高中畢業證的概率;……………………理6文8分

(Ⅲ)∵每科得A,B的概率分別為,∴學生甲被評為三好學生的概率為。……………………12分

19.(12分)解析:(Ⅰ)∵,∴

 ,,……………3分

(Ⅱ)∵,∴

,∴數列自第2項起是公比為的等比數列,………………………6分

,………………………8分

(Ⅲ)∵,∴,………………10分

。………………………12分

20.解析:(Ⅰ)∵,∴,∵底面,∴,∴平面,∴,又∵平面,∴,∴平面,∴。………………………4分

(Ⅱ)∵平面,∴,∴為二面角的平面角,………………………6分

,∴,又∵平面,∴,∴二面角的正切值的大小為。………………………8分

(Ⅲ)過點,交于點,∵平面,∴在平面內的射影,∴與平面所成的角,………………………10分

學科網(Zxxk.Com),∴,又∵,∴與平面所成的角相等,∴與平面所成角的正切值為。………………………12分

解法2:如圖建立空間直角坐標系,(Ⅰ)∵,,∴點的坐標分別是,∴,設,∵平面,∴,∴,取,∴,∴。………………………4分

(Ⅱ)設二面角的大小為,∵平面的法向量是,平面的法向量是,∴,∴,∴二面角的正切值的大小為。………………………8分

(Ⅲ)設與平面所成角的大小為,∵平面的法向量是,∴,∴,∴與平面所成角的正切值為。………………………12分

21.解析:(Ⅰ)設拋物線方程為,將代入方程得

所以拋物線方程為。………………………2分

由題意知橢圓的焦點為

設橢圓的方程為

∵過點,∴,解得,

∴橢圓的方程為。………………………5分

(Ⅱ)設的中點為的方程為:

為直徑的圓交兩點,中點為

,則

  

………………………8分

………………………10分

時,

此時,直線的方程為。………………………12分

22.(12分)解析:(Ⅰ)∵是偶函數,∴

又∵,………………………2分

得,

時,時,時,;∴時,函數

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