判断题：商业银行的总行统一负责本行理财产品投资运作等事项的审批与管理。

题型：完形填空

     Manners are important to happy relations among people. No one   1   a person with bad
manners. A   2   with good manners never laughs at people when they are in trouble. Instead, he  3
to help them. When he asks for something, he says "  4  ". And when he receives something, he  5
says "Thank you".  He does not interrupt (打扰)  6   people when they are talking, He does not talk
loudly or laugh loudly   7   public. When he sneezes or spits(吐痰) , he uses a   8  .  If he is late, he
  9   make an apology to the teacher either at the time   10   after class.

( )1. A. thinks
( )2. A. boy
( )3. A. tries
( )4. A. Give me
( )5. A. never
( )6. A. every
( )7. A. on
( )8. A. book
( )9. A. should
( )10. A. or

B. likes
B. girl
B. needs
B. Please
B. sometime
B. some
B. at
B. cup
B. will
B. nor

C. hates
C. person
C. has
C. Yes
C. usually
C. his
C. of
C. handkerchief
C. could
C. and

D. finds
D. people
D. enjoys
D. Hello
D. still
D. other
D. in
D. hand
D. may
D. but

查看答案

题型：问答题

（1）某同学用如图1所示的装置进行“验证动量守恒定律”的实验：

①先测出可视为质点的两材质相同滑块A、B的质量分别为m、M及滑块与桌面间的动摩擦因数μ．

②用细线将滑块A、B连接，使A、B间的轻弹簧处于压缩状态，滑块B恰好紧靠桌边．

③剪断细线，测出滑块B做平拋运动的水平位移x₁，滑块A沿水平桌面滑行距离为x₂（未滑出桌面）．

为验证动量守恒定律，写出还需测量的物理量及表示它们的字母______；如果动量守恒，需要满足的关系式为______．

（2）某实验小组利用拉力传感器和速度传感器探究功和动能变化的关系，如图2所示，他们将拉力传感器固定在小车上，用不可伸长的细线将其通过一个定滑轮与钩码相连，用拉力传感器记录小车受到拉力的大小．在水平桌面上相距50.0cm的A、B两点各安装一个速度传感器，记录小车通过A、B时的速度大小．小车中可以放置砝码．

（Ⅰ）实验中木板略微倾斜，这样做目的是______．

A．是为了使释放小车后，小车能匀加速下滑

B．是为了增大小车下滑的加速度

C．可使得细线拉力做的功等于合力对小车做的功

D．可使得小车在未施加拉力时做匀速直线运动

（Ⅱ）实验主要步骤如下：

①测量______和拉力传感器的总质量M₁；把细线的一端固定在拉力传感器上，另一端通过定滑轮与钩码相连；正确连接所需电路．

②将小车停在C点，接通电源，______，小车在细线拉动下运动，记录细线拉力及小车通过A、B时的速度．

③在小车中增加砝码，或增加钩码个数，重复②的操作．

（Ⅲ）下表是他们测得的一组数据，其中M1是传感器与小车及小车中砝码质量之和，|v

22

-v