Here is a question about this article: An alloy is a mixture of either pure or fairly pure chemical elements, which forms an impure substance (admixture) that retains the characteristics of a metal. An alloy is distinct from an impure metal, such as wrought iron, in that, with an alloy, the added impurities are usually desirable and will typically have some useful benefit. Alloys are made by mixing two or more elements; at least one of which being a metal. This is usually called the primary metal or the base metal, and the name of this metal may also be the name of the alloy. The other constituents may or may not be metals but, when mixed with the molten base, they will be soluble, dissolving into the mixture.
What is the answer to this question: What kind of substance is an alloy?
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So... impure


Here is a question about this article: Thus, the technological ability to detect any infectious agent rapidly and specifically are currently available. The only remaining blockades to the use of PCR as a standard tool of diagnosis are in its cost and application, neither of which is insurmountable. The diagnosis of a few diseases will not benefit from the development of PCR methods, such as some of the clostridial diseases (tetanus and botulism). These diseases are fundamentally biological poisonings by relatively small numbers of infectious bacteria that produce extremely potent neurotoxins. A significant proliferation of the infectious agent does not occur, this limits the ability of PCR to detect the presence of any bacteria.
What is the answer to this question: PCR can't detect the presence of any bacteria when what doesn't occur?
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So... significant proliferation of the infectious agent


Here is a question about this article: At the Battle of Pulo Aura, which was probably the company's most notable naval victory, Nathaniel Dance, Commodore of a convoy of Indiamen and sailing aboard the Warley, led several Indiamen in a skirmish with a French squadron, driving them off. Some six years earlier, on 28 January 1797, five Indiamen, the Woodford, under Captain Charles Lennox, the Taunton-Castle, Captain Edward Studd, Canton, Captain Abel Vyvyan, and Boddam, Captain George Palmer, and Ocean, Captain John Christian Lochner, had encountered Admiral de Sercey and his squadron of frigates. On this occasion the Indiamen also succeeded in bluffing their way to safety, and without any shots even being fired. Lastly, on 15 June 1795, the General Goddard played a large role in the capture of seven Dutch East Indiamen off St Helena.
What is the answer to this question: Where were the 7 Dutch Easteast indiamen capture?
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So...
off St Helena