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问题 单项选择题

主治肝肾阴亏，肝阳上亢，气血逆乱所致类中风证的方剂是（）

A．羚角钩藤汤

B．地黄饮子

C．大定风珠

D．天麻钩藤饮

E．镇肝熄风汤

答案

参考答案：E

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Trip 1   One Week in the Mountains
     Bring your strong shoes and warm clothes for this walk in a beautiful area of the Green Mountains. You
  may go hiking or have a try of rock climbing . This is also a protection area for wild animals. You can find
  many kinds of animals living in this area. 
              Time: May 8- May 14              Tel: 61639818
              Adult: $ 110.00                        Child : $ 55.00
Trip 2   Three Days in the Country  
      There are many beautiful gardens. Take your camera and enjoy the wonderful sight in Hunter Valley. It
  is a good place for fishing and horse-riding. You can also find different kinds of flowers here. This is also
  a great walk for bird-lovers.  
           Time: May 20- May 22             Tel: 63986432 
           Adult: $ 50.00                          Child : $ 25.00
Trip 3  Five Days By the Sea  
     Wear your sun hat and enjoy wonderful sunshine all the time from morning to evening. Our hotel is next
  to the sea. We have our own boats too. You can swim in the sea or in the swimming pool. Every day
 our boat will take you to different places for swimming.  
          Time: May 23- May 27             Tel: 67538293
          Adult: $ 80.00                    Child : $ 40.00
1. What number will you call if you and your friends want to enjoy the sunshine at the seaside?
    A. 67538293    
    B. 63986432      
    C. 64639818      
    D. 63875629 
2. Sam wants to stay in Hunter Valley with his wife ,his five-year-old daughter and his seven-year-old son. 
    How much will it cost?
    A. $ 25.        
    B. $ 50        
    C. $ 100        
    D. $ 150
3. David loves sports. He will take his holiday from May 7 to May 15. What activity will he probably take
    part in?
    A. Hiking in the mountains.    
    B. Watching plants at night.
    C. Fishing in the country      
    D. Swimming in the sea.
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问答题

（1）用落体法研究机械能守恒定律的实验中，某同学按照正确的操作选得纸带，但在处理纸带的过程中不小心把纸带撕成三个小段，并丢失了中间段的纸带，剩下的两段纸带如图所示．已知电源的频率为50Hz，在纸带上打出的各点间距离记录在下图中．

①A、B两点间的平均速度是______m/s；

②丢失的中间段纸带上有______个点；

③由这两段纸带可以求得当地的重力加速度g=______m/s2．

（2）．有一个额定电压为2.8V，功率约为0.8W的小灯泡，现要用伏安法描绘这个灯泡的I-U图线，有下列器材供选用：

A．电压表（0～3V，内阻6kΩ）

B．电压表（0～15V，内阻30kΩ）

C．电流表（0～3A，内阻0.1Ω）

D．电流表（0～0.6A，内阻0.5Ω）

E．滑动变阻器（10Ω，2A）

F．滑动变阻器（200Ω，0.5A）

G．蓄电池（电动势6V，内阻不计）

①用如图所示的电路进行测量，电压表应选用______，电流表应选用______．滑动变阻器应选用______．（用序号字母表示）

②通过实验测得此灯泡的伏安特性曲线如图所示．由图线可求得此灯泡在正常工作时的电阻为______Ω．

③若将此灯泡与电动势6V、内阻不计的电源相连，要使灯泡正常发光，需串联一个阻值为______Ω的电阻．
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