Countries with little industry are called

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

Modern austria followed switzerland's economic model by a. exploiting its natural resources b. developing skilled-labor industries c. engaging in strip mining d. relying on a tourism industry

If you wanted to follow the longest river and hike upstream,which direction would you head