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				8．設(shè)是展開(kāi)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(kāi)來(lái)。(spread) 
              _________________________________________________________________ 
          2. 我們都知道他不誠(chéng)實(shí)。(it's known to sb.)
              _________________________________________________________________
          3. 說(shuō)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(duì)我們的身體是有害的。(harmful)
              _________________________________________________________________
          5. 他們?cè)谠虑蛏系母杏X(jué)和在地球上聽(tīng)說(shuō)的完全不一樣。(be different from)
              _________________________________________________________________
          

			
          
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          根據(jù)情景對(duì)話和內(nèi)容，從對(duì)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(duì)話和內(nèi)容，從對(duì)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(duì)話和內(nèi)容，從對(duì)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(duì)話和內(nèi)容，從對(duì)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(zhǎng)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(guò)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(zhǎng)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(duì)稱性可知，點(diǎn)為拋物線上關(guān)于軸對(duì)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(píng)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(duì)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(guò)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(guò)點(diǎn)		
          
	
          
	
          
		
          


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