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
and unique design, Bean Pole was not hit by the severe competition which overflowed in the 90s in casual brand industries. With combination of fabrics, standardization of colors, and design map using fabric and colors Bean Pole set average quality of each material every month, made code systems for different colors for every season which resulted in reduction of time. These processes reduced prod
And students will be asked some questions by teacher to participate in the class. After the questions, Teacher will answer the question kindly. This friendly relationship between teacher and students can make this class going on smoothly. In this time, Teacher usually uses powerpoint program to teach the class. Students can see pictures andvisualmaterial with interest. Also, there is going to b
material is written in understandable language that is equivalent to their capability." At a first look, people might think that Shakespeare would be too difficult for the elementary school students. However, elementary students are in the process of rapid cognition development, and teaching Shakespeare would make students to be interested in textual materials. Furthermore, the content materials
3D printing
3D printing or additive manufacturing (AM) refers to any of the various processes for printing a three-dimensional object. Primarily additive processes are used, in which successive layers of material are laid down under computer control. These objects can be of almost any shape or geometry, and are produced from a 3D model or other electronic data source.
Basic principles
If the