一、還原句子
閱讀短文,從方框所給的選項(xiàng)中選出可以填入空白處的最佳選項(xiàng)。其中有一個(gè)多余的選項(xiàng)。
Have you ever noticed the black and white bars on a book? Do you know what they are used for?
They are bar-codes(條形碼)used in most products. If you go to a supermarket, you can see almost every product with a bar-code on it. Bar-codes have information about the product, name and production date. 1.______
C
Just scan the bar-code and everything is clear.
The first use of a bar-code in a supermarket checkout system was on a pack of American Wrigley Company chewing gum in 1974. Beyond supermarkets, bar-codes are needed everywhere: for renting cars, for luggage checks on a plane, for parcels(包裹)you send. 2.______
A
Most of our things would get lost in the post.
3.______
D
Bar-codes in the past were 1-D(one-dimensional空間), but now there are 2-D bar-codes, such as QR code. Since 2009, QR has been used on Chinese train tickets. People can enter stadiums, cinemas and theaters by holding certain types of bar-codes.
With these small codes, life is getting much easier for us.
If you find these bar-code things boring, a bar-code building might be more up your street. 4.______
E
It looks strange, but it's actually a shopping mall. There are games too. Bar-code Monsters is a mobile phone game. You have to scan bar-codes and find the monsters!
A. Life would be rather difficult without bar-codes.
B. Where can you find the information of the products?
C. It's an easy and convenient way to know about the products.
D. Bar-codes change as well.
E. In St Petersburg, Russia, there is a building designed like a bar-code.