阅读短文，选择正确答案。
Soon computer and other machines will be able to remember you by looking at your eyes! The program
works because everyone's eyes are different. So in the future you won't have to remember a number when you
want to use a machine or take money out of a bank. You'll just have to look at the machine and it will be able to
tell who you are.
The eyes-recognition program is already being tested in shops and banks in the USA, Britain, Spain, Italy and
Turkey. Soon, this technology Will instead of all other ways of finding out who people are.
However, scientists are working on other systems. Machine will soon be able to know you from the shape
of your face or hand or even your smell! We already have machines that can tell who you are from your voice or
the mark made by your finger.
Eye-recognition is better than other kinds because your eye don't change as you get older, or get dirty like
hands or fingers. And even twins have different eyes, so the program can be up to 94% correct, depending on
how good the technology is. Some programs may only be right 51% of the time. In Britain, it was found that
91% of people who had tried it said that they liked the idea of eye-recognition.
In the future your computer will be looking you in the eye, So smile!
1. How does the eye-recognition programs work? [ ]
A. You write your number.
B. You show your ID card.
C. You look at the machine.
D. You say your name.
2. Why can the programs be up to 94% correct? [ ]
A. Because eyes never change.
B. Because hands or fingers can get dirty.
C. Because people like the idea of the program
D. Because the program is widely sued around the world.
3. Which of the following is true? [ ]
A. The program is being tested in Japan.
B. Machines with other systems can also tell who you are.
C. 91% of people like the idea of the program.
D. Computers can remember you by looking at your clothes.
4. What does Paragraph 4 talk about? [ ]
A. Introduction to other kinds of programs.
B. Advantages of the program
C. The places where the program is tested.
D. The way how the program works.
因为速度大小不变，所以加速度为零，处于平衡状态
受合力不等于零