问题 阅读理解

阅读理解。

     All students need to have good study habits (习惯). When you have good study habits, you can learn

things quickly.You also remember (记得) them easily.

     Do you like to study in the living-room? This is not a good place because it is usually too noisy. You

need to study in a quiet (安静) place, like your bedroom. A quiet place will help you only think about one

thing, and you will learn better.

     Before you begin to study, do not forget to clean you desk, A good desk light is important (重要),

too. You'll feel tired (累) easily if there is not enough light .

1.When you have good study habits,you will _____.

A. learn things quickly                  

B. remember things easily  

C. think about one thing                  

D. both Aand B

2. You will feel tired easily if the light is _____.

A. good          

B. enough                

C. bad        

D. wonderful

3. The best title (标题) for this passage is _____.

A. Study in the Bedroom                  

B.  Good Study Habits

C. How to study                         

D.  Desk Light is Important

答案

1-3 DCB

单项选择题 A3/A4型题
实验题

(1)①某同学设计了一个探究小车的加速度a与小车所受拉力F及质量m关系的实验,图中(甲)为实验装置简图。他想用钩码的重力表示小车受到的合外力,为了减小这种做法带来的实验误差,你认为下列说法中正确的是( )(选填字母代号).

A.实验时要平衡摩擦力                B.实验时不需要平衡摩擦力

C.钩码的重力要远小于小车的总重力    D.实验进行时应先释放小车再接通电源

②如图(乙)所示是某次实验中得到的一条纸带,其中A、B、C、D、E是计数点(每打5个点取一个计数点),其中L1="3.07cm," L2="12.38cm," L3="27.87cm," L4=49.62cm。则打C点时小车的速度为______m/s,小车的加速度是_______m/s2。(计算结果均保留三位有效数字)

(2)某实验小组用如图甲的电路测量一直流安培表的内电阻。所给的器材有: 电池E(约4.5V);电流表A(量程0~300mA,待测内阻约为5Ω);电压表V(量程0~3V);电阻箱R1;滑动变阻器R2(0~10Ω),以及电键S和导线若干。

①图乙实物图中,已连接了部分电路,请完成余下电路的连接。

②请完成主要实验的步骤:

A、连接好实验电路,把变阻器的滑动片调到______(a或b端);

B、闭合电键,调节__________________________,使通过安培表电路电流从小到大变化,读出并记录数据。

③若电压表、电流表的读数分别为U和I,电阻箱读数为R1,则电流表的内电阻