Magnetic resonance imaging (MRI) is a noninvasive medical test that physicians use to diagnose and treat medical conditions.MRI uses a powerful magnetic field, radio frequency pulses and a computer to produce detailed pictures of organs, soft tissues, bone and virtually all other internal body structures.agnetic resonance imaging (MRI) is a noninvasive medical test that physicians use to diagnose and treat medical conditions.
The Guangxu Emperor (14 August 1871 â 14 November 1908), personal name Zaitian (Manchu: Dzai-Tiyan), was the eleventh emperor of the Qing dynasty, and the ninth Qing emperor to rule over China. His reign lasted from 1875 to 1908, but in practice he ruled, under Empress Dowager Cixi's influence, only from 1889 to 1898.
The Xiongnu (Chinese: åå¥´) were nomads who lived north of China from about 3rd century BC to 460s AD.Their lands were very infertile, so they tried to attack China many times. As this was very irritating, the first emperor of China (Qin Shi Huang) built the Great Wall of China around 214 to 206 BC to keep them out.he Xiongnu (Chinese: åå¥´) were nomads who lived north of China from about 3rd century BC to 460s AD.