Problem: Tucson's Sun Tran bus system serves greater Tucson with standard, express, regional shuttle, and on-demand shuttle bus service. It was awarded Best Transit System in 1988 and 2005. A 3.9-mile streetcar line, Sun Link, connects the University of Arizona campus with 4th Avenue, downtown, and the Mercado District west of Interstate 10 and the Santa Cruz River. Ten-minute headway passenger service began July 25, 2014. The streetcar utilizes Sun Tran's card payment and transfer system, connecting with the University of Arizona's CatTran shuttles, Amtrak, and Greyhound intercity bus service.
How long is the Sun Link?
The answer is the following: 3.9-mile

Problem: Reflections generally affect polarization. For radio waves, one important reflector is the ionosphere which can change the wave's polarization. Thus for signals received following reflection by the ionosphere (a skywave), a consistent polarization cannot be expected. For line-of-sight communications or ground wave propagation, horizontally or vertically polarized transmissions generally remain in about the same polarization state at the receiving location. Matching the receiving antenna's polarization to that of the transmitter can make a very substantial difference in received signal strength.
What reflector can change the waves polarization?
The answer is the following: ionosphere

Problem: Wine was considered the basic drink, consumed at all meals and occasions by all classes and was quite inexpensive. Cato the Elder once advised cutting his rations in half to conserve wine for the workforce. Many types of drinks involving grapes and honey were consumed as well. Drinking on an empty stomach was regarded as boorish and a sure sign for alcoholism, the debilitating physical and psychological effects of which were known to the Romans. An accurate accusation of being an alcoholic was an effective way to discredit political rivals. Prominent Roman alcoholics included Mark Antony, and Cicero's own son Marcus (Cicero Minor). Even Cato the Younger was known to be a heavy drinker.[citation needed]
During what meals was wine commonly drank?
The answer is the following: all meals

Problem: Clinical immunology is the study of diseases caused by disorders of the immune system (failure, aberrant action, and malignant growth of the cellular elements of the system). It also involves diseases of other systems, where immune reactions play a part in the pathology and clinical features.
What else does clinical immunology concern itself with?
The answer is the following:
diseases of other systems