问题 多项选择题

山楂的适应证是()。

A.饮食积滞证

B.疝气作痛

C.产后瘀阻腹痛

D.泻痢腹痛

E.瘀滞胸胁痛

答案

参考答案:A, B, C, D, E

完形填空
完形填空。   
     It's never easy to admit (承认)you are in the wrong. We all 1 to know the art of apology ( 道歉). Think how often you've done wrong. Then count how many   2   you've expressed clearly you were 3 . You can't go to bed with an easy mind if you do   4  about it.    
     A doctor friend, Mr. Lied, told me about a man who came to him with different kinds of signs: headaches, heart trouble and insomnia (失眠症).  5  some careful exams, Mr. Lied found nothing wrong with him and said, “If you don't tell me what's 6  you, I can't help you.”    
The man admitted he was cheating (骗取)his brother of his inheritance (遗产). Then and there the clever
doctor   7 the man write to his brother and  8  his money. As soon as the letter was put into the post box,
the man suddenly cried. “Thank you,” he said to the doctor, “I think I've got well.”    
     An apology can not only save a broken relationship (关系), but also make it  9  .If you can think of
someone who should be 10  an apology from you, do something about it right now.
( )1. A. decide
( )2. A. mistakes
( )3. A. sorry
( )4. A. something
( )5. A. Before
( )6. A. hurting
( )7. A. made
( )8. A. gave
( )9. A. newer
( )10.A. received

B. have
B. people
B. weak
B. anything
B. After
B. changing
B. helped
B. kept
B. worse
B. give

C. need
C. ways
C. sad
C. nothing
C. Till
C. touching
C. let
C. returned
C. harder
C. known

D. try        
D. times      
D. wrong      
D. everything  
D. Since      
D. worrying    
D. saw        
D. paid        
D. stronger    
D. forgotten  

实验题

(18分)(1)研究小车匀加速直线运动的实验装置如下图(甲)所示,其中斜面倾角θ可调,打点计时器的工作频率为50HZ,纸带上计数点的间距如下图(乙)所示,其中每相邻两点之间还有4个记录点未画出.

①某同学的部分实验步骤如下:

A.测量完毕,关闭电源,取出纸带

B.接通电源,待打点计时器工作稳定后放开小车

C.将小车停靠在打点计时器附近,小车尾部与纸带相连

D.把打点计时器固定在平板上,让纸带穿过限位孔

上述实验步骤的正确顺序是:       (选填字母代号即可).

②图(乙)中标出的相邻两计数点的时间间隔T=       s.

③计数点6对应的瞬时速度大小计算式为v6=        (用题中字母表示).

④为了充分利用记录数据,减小误差,小车加速度大小的计算式应为a=      

(2)一个额定功率为0.1W的电阻Rx,其阻值不详,有两个研究性学习小组分别设计了以下实验方案测量该电阻.

①第一组同学先用欧姆表粗测其阻值,其结果如下图所示,该组同学还备有以下器材.

A.电流表,量程0~500μA,内阻约150Ω

B.电流表,量程0~10mA,内阻约10Ω

C.电压表,量程0~3V,内阻约5KΩ

D.电压表,量程0~15V,内阻约10KΩ

E.干电池两节,每节电动势为1.5V

F.直流稳压电源,输出电压12V,额定电流1A

G.滑动变阻器,0~50Ω,0.5A

H.电键一只,导线若干

试帮助该组同学选择合适的器材及适当的电路,较精确  

地测量Rx. 

Ⅰ. 欧姆表测得的Rx约为     Ω;

Ⅱ. 电流表应该选择       ,电压表应该选择      ,电源应该选择      (选填字

母代号即可);

Ⅲ. 请在下图中选择合适的电路图测量该电阻Rx,要求电流表电压表的读数从零始    

②第二组同学选择合适的器材后,利用如下图所示的电路进行测量,他们的主要实验步

骤如下:

第一步:将开关S2接2,闭合开关S1,调节滑动变阻器RP和RW,使电表读数接近满量程,但不超过量程,记录此时电压表和电流表的示数U1、I1

第二步:将开关S2接1,记录此时电压表、电流表示数U2、I2

Ⅰ.由以上记录的数据计算出被测电阻Rx的表达式为Rx    

Ⅱ.简要分析此实验方案为何能避免因电表内阻而引起的实验误差.