1. Fluctuations of aggregate economic activity. 2.Cycles Expansion/Boom and Contraction/Recession. Peak and Trough: They are the turning Points of the business cycle. 3. Comovements of many macro variables over the business cycle.
Section 5: Using external media: CDs, DVDs and removable USB storage devices. â¢ dvd-r:until about 2005 the most common and portable format; cannot be erased or reused. â¢ dvd-rw:are-writable version of-rformat, similar to cdrw format CD discs.
To accomplish this task, when you actually place a DVD into a Blu-ray Disc player, the Blu-ray Disc player activates the red laser assembly so that it can read the DVD. In addition, when you place a CD into a Blu-ray Disc player, the same red laser assembly that is used to read DVDs is refocused to read the CD.