controlled by a small number of diamond mining firms. As a result, any decisions made to restrict the supply of rough diamonds by these firms to BlueNile’s suppliers could substantially impair the ability to acquire diamonds at commercially reasonable prices. If BlueNile is unable to acquire diamonds at commercially reasonable prices, costs may exceed forecasts, gross margins and operating resu
1. Listening Comprehension
1~3) Listen to the following and answer the question.
Pre-history
Prior to the release of bitcoin there were a number of digital cash technologies starting with the issuer based e-cash protocols of David Chaum and Stefan Brands. Adam Back developed hashcash, a proof- of-work scheme for spam control. The first proposals for distributed digital scarcity based cryp
number of business-type transactions with the public, and require a greater flexibility than the customary type of appropriations budget ordinarily permits.
Price control, entry control, production control, procompetitive regulation (economic regulation)
Controlling Entry is the regulation of the entry and exit of firms into a regulated market, which is implemented by mandatory r
control is made
(e.g., when the volume get higher than the volume that we want initially)
We wanted to design our MP3 player to overcome this kind of errors.
2. Muscular strain
The increased use of electronic machines which have displays has brought about the development of a number of health concerns. Many people who work at a computer Video Display Terminal (VDT) report a
number of Internet addict -
2112000persons (1/10 total Internet users)
Adult Internet addict ratio – 6.5%
Juvenile Internet addict ratio – 14.4%
- 2007 Center for internet addiction
1. Psychological (or pathological) approaching method
- Causes of Internet addiction
Low self-esteem
Undeveloped self-control (mainly related to age)
2. Social support a