It is unlikely that you have an allergy to beer or to alcohol. Although there are rare cases of documented allergies to alcohol, this is very uncommon. However, another condition is quite common. This is a deficiency in an enzyme called acetaldehyde dehydrogenase.
North Korea runs trading companies in Thailand, Hong Kong, Macau and Cambodia, which export North Korean goods - mostly clothing, plastics and minerals such as copper - to the region.
The top three U.S. exports to China in 2008 were electrical machinery ($9.5 billion), oil seeds and related products ($9.3 billion), and nuclear reactors and related machinery ($8.4 billion). China is now one of the most important markets for U.S. exports: in 2009, U.S. exports to China totaled $69.6 billion, a 0.2% decrease from 2008. Those percentages were down far less than U.S. exports to other major trading partners in the year following the global financial crisis.