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.
Amazon's Choice. for laptop dvd player. External Optical Drive USB 2.0 DVD/CD Player For Mac Windows 98/ SE /ME / 2000 / XP / Vista / Win 7/ Win 8/Win 10,Ultra Notebook PC Desktop Computer+Dustproo Bag Case,Black. by Chuanganzhuo.