QUES: Proto-Slavic, the supposed ancestor language of all Slavic languages, is a descendant of common Proto-Indo-European, via a Balto-Slavic stage in which it developed numerous lexical and morphophonological isoglosses with the Baltic languages. In the framework of the Kurgan hypothesis, "the Indo-Europeans who remained after the migrations [from the steppe] became speakers of Balto-Slavic".

What did Proto-Indo-European form with Balto languages?
What is the answer?
ANS: unanswerable
QUES: A person can be exposed to uranium (or its radioactive daughters, such as radon) by inhaling dust in air or by ingesting contaminated water and food. The amount of uranium in air is usually very small; however, people who work in factories that process phosphate fertilizers, live near government facilities that made or tested nuclear weapons, live or work near a modern battlefield where depleted uranium weapons have been used, or live or work near a coal-fired power plant, facilities that mine or process uranium ore, or enrich uranium for reactor fuel, may have increased exposure to uranium. Houses or structures that are over uranium deposits (either natural or man-made slag deposits) may have an increased incidence of exposure to radon gas. The Occupational Safety and Health Administration (OSHA) has set the permissible exposure limit for uranium exposure in the workplace as 0.25 mg/m3 over an 8-hour workday. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) of 0.2 mg/m3 over an 8-hour workday and a short-term limit of 0.6 mg/m3. At levels of 10 mg/m3, uranium is immediately dangerous to life and health.

What is the OSHA uranium exposure limit for an 8-hour workday?
What is the answer?
ANS: 0.25 mg/m3
QUES: From the league's inception through ArenaBowl XVIII, the championship game was played at the home of the highest-seeded remaining team. The AFL then switched to a neutral-site championship, with ArenaBowls XIX and XX in Las Vegas. New Orleans Arena, home of the New Orleans VooDoo, served as the site of ArenaBowl XXI on July 29, 2007. This was the first professional sports championship to be staged in the city since Hurricane Katrina struck in August 2005. The San Jose SaberCats earned their third championship in six years by defeating the Columbus Destroyers 55–33. ArenaBowl XXI in New Orleans was deemed a success, and the city was chosen to host ArenaBowl XXII, in which the Philadelphia Soul defeated the defending champion San Jose Sabercats. In 2010, the location returned to being decided by which of the two participating teams was seeded higher. In ArenaBowl XXIII, the Spokane Shock defeated the Tampa Bay Storm at their home arena, Spokane Arena, in Spokane, Washington. In ArenaBowl XXIV, the Jacksonville Sharks, coming off of a victory in their conference final game four nights earlier, traveled to US Airways Center in Phoenix and defeated the Arizona Rattlers 73–70. ArenaBowl XXV returned to a neutral site and was once again played in New Orleans, where the Rattlers returned and defeated the Philadelphia Soul. Since 2014 the ArenaBowl has been played at the higher-seeded team.

What team won ArenaBowl XXI?
What is the answer?
ANS:
San Jose SaberCats