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				8．設(shè)是展開式的中間項(xiàng).若在區(qū)間上恒成立.則實(shí)數(shù)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(jù)報(bào)道，那種疾病已經(jīng)在全市擴(kuò)散開來。(spread) 
        _________________________________________________________________ 
    2. 我們都知道他不誠實(shí)。(it's known to sb.)
        _________________________________________________________________
    3. 說實(shí)話，他是個(gè)靠得住的人。(depend on) 
        _________________________________________________________________
    4. 眾所周知，污染的空氣和水對我們的身體是有害的。(harmful)
        _________________________________________________________________
    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(jù)情景對話和內(nèi)容，從對話后所給的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)，并在答題卡上將該選項(xiàng)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(shí)，則在答題卡上選涂A和C兩項(xiàng)；若選G為答案時(shí)，則在答題卡上選涂A和D兩項(xiàng)。
    


    ---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(jù)情景對話和內(nèi)容，從對話后所給的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)，并在答題卡上將該選項(xiàng)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(shí)，則在答題卡上選涂A和C兩項(xiàng)；若選G為答案時(shí)，則在答題卡上選涂A和D兩項(xiàng)。
    


    ---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(jù)情景對話和內(nèi)容，從對話后所給的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)，并在答題卡上將該選項(xiàng)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(shí)，則在答題卡上選涂A和C兩項(xiàng)；若選G為答案時(shí)，則在答題卡上選涂A和D兩項(xiàng)。
      
    ---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(jù)情景對話和內(nèi)容，從對話后所給的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)，并在答題卡上將該選項(xiàng)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(shí)，則在答題卡上選涂A和C兩項(xiàng)；若選G為答案時(shí)，則在答題卡上選涂A和D兩項(xiàng)。
      
    ---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：∵
    ，
    故選B。
    3．解析：由，得，此時(shí)，所以，，故選C。
    4．解析：顯然，若與共線，則與共線；若與共線，則，即，得，∴與共線，∴與共線是與共線的充要條件，故選C。
    5．解析：設(shè)公差為，由題意得，；，解得或，故選C。
    6．解析：∵雙曲線的右焦點(diǎn)到一條漸近線的距離等于焦距的，∴，又∵，∴，∴，∴雙曲線的離心率是。故選B.
    7.解析：∵、為正實(shí)數(shù)，∴，∴；由均值不等式得恒成立，，故②不恒成立，又因?yàn)楹瘮?shù)在是增函數(shù)，∴，故恒成立的不等式是①③④。故選C.
    8．解析：∵，∴在區(qū)間上恒成立，即在區(qū)間上恒成立，∴，故選D。
    9．解析：∵
    ，此函數(shù)的最小值為，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(qū)間上是增函數(shù)且，∴其反函數(shù)在區(qū)間上是增函數(shù)，∴，故選A
    12．解析：如圖，①當(dāng)或時(shí)，圓面被分成2塊，涂色方法有20種；②當(dāng)或時(shí)，圓面被分成3塊，涂色方法有60種；
    ③當(dāng)時(shí)，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：做出表示的平面區(qū)域如圖，當(dāng)直線經(jīng)過點(diǎn)時(shí)，取得最大值5。
    學(xué)科網(wǎng)(Zxxk.Com)14.解析：∵，∴時(shí)，，又時(shí)，滿足上式，因此，，
    ∴。
    學(xué)科網(wǎng)(Zxxk.Com)15．解析：設(shè)正四面體的棱長為，連，取的中點(diǎn)，連，∵為的中點(diǎn)，∴∥，∴或其補(bǔ)角為與所成角，∵，，∴，∴，又∵，∴，∴與所成角的余弦值為。
    學(xué)科網(wǎng)(Zxxk.Com)16．解析：∵，∴，∵點(diǎn)為的準(zhǔn)線與軸的交點(diǎn)，由向量的加法法則及拋物線的對稱性可知，點(diǎn)為拋物線上關(guān)于軸對稱的兩點(diǎn)且做出圖形如右圖，其中為點(diǎn)到準(zhǔn)線的距離，四邊形為菱形，∴，∴，∴，∴，∴，∴向量與的夾角為。
    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(huì)考不合格的概率均為，∴學(xué)生甲不能拿到高中畢業(yè)證的概率；……………………理6文8分
    （Ⅲ）∵每科得A，B的概率分別為，∴學(xué)生甲被評為三好學(xué)生的概率為。……………………12分
    （理）∵，，，�！�9分
    ∴的分布列如下表：
    0
    1
    2
    3
    ∴的數(shù)學(xué)期望�！�12分
    19．(12分)解析：（Ⅰ）時(shí)，
    ，，
         
    由得， 或  
………3分
     
     
    +
    0
    －
    0
    +
    遞增
    極大值
    遞減
    極小值
    遞增
    ，      ………………………6分
    （Ⅱ）在定義域上是增函數(shù)，
    對恒成立，即  
      
………………………9分
    又（當(dāng)且僅當(dāng)時(shí)，）
                   

     ………………………4分
    學(xué)科網(wǎng)(Zxxk.Com)              

    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(diǎn)做∥，交于點(diǎn)，∵平面，∴為在平面內(nèi)的射影，∴為與平面所成的角，………………………10分
    學(xué)科網(wǎng)(Zxxk.Com)∵，∴，又∵∥，∴和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(biāo)系，（Ⅰ）∵，，∴點(diǎn)的坐標(biāo)分別是，，，∴，，設(shè)，∵平面，∴，∴，取，∴，∴。………………………4分
    （Ⅱ）設(shè)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(shè)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.（Ⅰ） 解析：如圖，設(shè)右準(zhǔn)線與軸的交點(diǎn)為，過點(diǎn)		
    
	
    
	
    
		
    


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