1.The protracted nature of the war and its attendant ruthlessness have made it imperative for guerrilla warfare to undertake many unusual tasks; hence such problems as those of the base areas, the development of guerrilla warfare into mobile warfare, and so on.
2.Consider a researcher in a pharmaceutical company.In response to a query about an unusual series of side effects of a drug, the researcher uncovers few related documents within the corporate information base.
