Here is a question about this article: Gain is a parameter which measures the degree of directivity of the antenna's radiation pattern. A high-gain antenna will radiate most of its power in a particular direction, while a low-gain antenna will radiate over a wider angle. The antenna gain, or power gain of an antenna is defined as the ratio of the intensity (power per unit surface area)  radiated by the antenna in the direction of its maximum output, at an arbitrary distance, divided by the intensity  radiated at the same distance by a hypothetical isotropic antenna which radiates equal power in all directions. This dimensionless ratio is usually expressed logarithmically in decibels, these units are called "decibels-isotropic" (dBi)
What is the answer to this question: What is the meaning of intensity?
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So... power per unit surface area


Here is a question about this article: On May 29, 2008, government officials began inspecting the ruins of thousands of schools that collapsed, searching for clues about why they crumbled. Thousands of parents around the province have accused local officials and builders of cutting corners in school construction, citing that after the quake other nearby buildings were little damaged. In the aftermath of the quake, many local governments promised to formally investigate the school collapses, but as of July 17, 2008 across Sichuan, parents of children lost in collapsed schools complained they had yet to receive any reports. Local officials urged them not to protest but the parents demonstrated and demanded an investigation. Furthermore, censors discouraged stories of poorly built schools from being published in the media and there was an incident where police drove the protestors away.
What is the answer to this question: What did parents accuse builders of doing?
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So... cutting corners


Here is a question about this article: If a more consistent report with the genetic groups in the gradation of miscegenation is to be considered (e.g. that would not cluster people with a balanced degree of African and non-African ancestry in the black group instead of the multiracial one, unlike elsewhere in Latin America where people of high quantity of African descent tend to classify themselves as mixed), more people would report themselves as white and pardo in Brazil (47.7% and 42.4% of the population as of 2010, respectively), because by research its population is believed to have between 65 and 80% of autosomal European ancestry, in average (also >35% of European mt-DNA and >95% of European Y-DNA).
What is the answer to this question: Brazil's population is believed to have between what percentages of autosomal European ancestry?
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So...
65 and 80%