tailieunhanh - Toefl cbt book part 23

Thorough preparation leads to better scores, so you need to make the most of your available study time. This guide is the most complete, precise, and accurate of all study products available. | Part Mr Mr Vew p Wd visit Tai Lieu Du Hoc at 13. B. Ubiquitous means omni-present or existing everywhere. 14. C. The word stagnant means stale out-of-date or not changing. This passage states that the bar code concept is still being changed. 15. D. The passage indicates that the bar code has been used in various ways since the 70s. 16. A. The passage covers both a review of existing technology and the new twodimensional code. 17. A. The two-dimensional bar code with an information density of 1 100 bytes allows a considerably greater amount of information to be coded than the traditional bar code including customized information. Thus the manufacturer is able to add additional information on the bar code that it finds useful for its own tracking purposes. It also has built-in redundancy meaning that the identical information is duplicated on the same code. Therefore if the code is damaged it can still be read. The technology even allows pictures or text to be contained within the code as well as barcode encryption. The new technology dramatically reduces the errors of the single dimensional bar code and reduces the enormous costs that some companies have reported in the past. 18. A. The reading states that the code consists of horizontal lines black print on a white background with two and sometimes four different widths and Arabic numerals underneath. 19. B. The passage states The bar code used on grocery products introduced in the 1970s is called a universal product code or UPC and assigns each type of food or grocery product a unique code. 20. A. Width is the noun related to the noun wide. It describes the size from left to right. 21. A. Traditional refers to a long-standing tradition or convention. 22. B. Keeping track of products stocked and sold means the same thing as inventory control. The other uses mentioned are potential uses of the new two-dimensional bar code. 23. D. In this context considerably means far or much. 200 For more .