The human brain weighs about 1.4 kilograms, but it can, hold much more information than most computers. However, there is another difference between humans and computers. Computers don't forget information they are given, but humans often do. No one remembers everything, and luckily we don't usually have to. But everyone can improve their memory if they want to. Here are some suggestions.
◆Try to use new informati6n immediately. For example, if you meet someone who says "Hi! I'm Carlos," don't just say "Hello." Repeat the person's name. Say"____"
◆Break a big number into smaller parts. For example, it's hard to memorize (记忆) 109244153. But if you break it into three parts--109/244/153—it becomes easier.
◆Write out what you need to remember ever and over again. This will help you keep it in mind longer, especially for memorizing formulas (公式) or facts.
◆Always review information. If you bring what you've learned back to your mind, they become easier to remember. For example, before you go to sleep, it’s a good idea to review the new things you learned that clay.
◆Discuss with a friend. It is always easier to remember things through discussions. You can have a discussion about what's right and what's wrong, and it will lead to the right answer.
◆Never tell yourself that you have a bad memory. You can always do something to help improve your memory. And everyone's memory gets better if they use it often enough.
All of the suggestions are helpful. If you follow them, you are certain to improve your memory.
小题1:How many suggestions are mentioned in the passage?
A．Three.
B．Four.
C．Five.
D．Six.小题2:Which should be put in the blank (空格) in Paragraph 2？
A．Hello, Carlos.
B．How do you do?
C．Hello, I am Sophia.
D．Glad to meet you!小题3:What can help memorize a big number more easily according to the passage?
A．To store it in a computer.
B．To break it into stunner parts.
C．To discuss it with a friend.
D．To review it before you sleep.小题4:Which of the following is true according to the passage?
A．Discussing with friends can help you remember things.
B．Always reviewing information can help you fall asleep.
C．Formulas and facts can help you learn about your brain.
D．Human beings can improve their memory by computer.小题5:What does the sentence "Never tell yourself that you have a bad memory” mean?
A．You should tell others about your bad memory.
B．You should believe in other people all the time.
C．You should ask others to improve their memory.
D．You should ho confident in your memory ability.
在“测定匀变速直线运动的加速度”的实验中，如图为一次实验得到的一条纸带，纸带上每相邻的两计数点间都有四个点未画出，按时间顺序取0、1、2、3、4、5六个计数点，用米尺量出1、2、3、4、5点到0点的距离如图所示（单位：cm）。由纸带数据计算可得计数点4所代表时刻的瞬时速度大小v4＝________m／s，小车的加速度大小a＝________m／s2。
=
=
0．40m／s
=0．76m／s2。