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Despite the continuing prominence of Nanjing (then known as Jiankang), the settlement of Qiantang, the former name of Hangzhou, remained one of the three major metropolitan centers in the south to provide major tax revenue to the imperial centers in the north China. The other two centers in the south were Jiankang and Chengdu. In 589, Qiangtang was raised in status and renamed Hangzhou.
Besides Qiantang and Jiankang, what was the other major metropolitan center in the south?
A: Chengdu

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Many organisms (of which humans are prime examples) eat from multiple levels of the food chain and, thus, make this classification problematic. A carnivore may eat both secondary and tertiary consumers, and its prey may itself be difficult to classify for similar reasons. Organisms showing both carnivory and herbivory are known as omnivores. Even herbivores such as the giant panda may supplement their diet with meat. Scavenging of carrion provides a significant part of the diet of some of the most fearsome predators. Carnivorous plants would be very difficult to fit into this classification, producing their own food but also digesting anything that they may trap. Organisms that eat detritivores or parasites would also be difficult to classify by such a scheme.
What can make classification of predators problematic when using a food pyramid?
A: Many organisms (of which humans are prime examples) eat from multiple levels of the food chain

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By the 1890s the profound effect of adrenal extracts on many different tissue types had been discovered, setting off a search both for the mechanism of chemical signalling and efforts to exploit these observations for the development of new drugs. The blood pressure raising and vasoconstrictive effects of adrenal extracts were of particular interest to surgeons as hemostatic agents and as treatment for shock, and a number of companies developed products based on adrenal extracts containing varying purities of the active substance. In 1897 John Abel of Johns Hopkins University identified the active principle as epinephrine, which he isolated in an impure state as the sulfate salt. Industrial chemist Jokichi Takamine later developed a method for obtaining epinephrine in a pure state, and licensed the technology to Parke Davis. Parke Davis marketed epinephrine under the trade name Adrenalin. Injected epinephrine proved to be especially efficacious for the acute treatment of asthma attacks, and an inhaled version was sold in the United States until 2011 (Primatene Mist). By 1929 epinephrine had been formulated into an inhaler for use in the treatment of nasal congestion.
Who marketed Primatene?
A: unanswerable

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As a child, Spielberg faced difficulty reconciling being an Orthodox Jew with the perception of him by other children he played with. "It isn't something I enjoy admitting," he once said, "but when I was seven, eight, nine years old, God forgive me, I was embarrassed because we were Orthodox Jews. I was embarrassed by the outward perception of my parents' Jewish practices. I was never really ashamed to be Jewish, but I was uneasy at times." Spielberg also said he suffered from acts of anti-Semitic prejudice and bullying: "In high school, I got smacked and kicked around. Two bloody noses. It was horrible."
How many bloody noses did Spielberg get from fighting while in elementary school?
A:
unanswerable