問題詳情

Many people depend on volcanoes for their survival.The geothermal energy of a volcano can power technologicalsystems for nearby communities. Soil near active volcanoes isoften rich in mineral deposits and provides excellent farmingopportunities. Lots of people visit volcanoes each year, so jobsoften pop up nearby in hotels, restaurants, gift shops, and as tourguides. And some people simply do not have the financialresources to move.Many residents of the area around Kilauea may also thinkit’s worth the risk, given the beauty, community, and remotenessof Hawaii. Volcanoes also tend to give notice that something isabout to happen—Kilauea’s small earthquakes, increasingamounts of lava at the summit, and a change in the slope of thevolcano all indicated in recent weeks that an eruption mayhappen soon. This isn’t necessarily the case in other parts of theworld, where earthquakes, tornadoes, fires, and floods can springup without warning.The evacuation of nearby communities because ofKilauea’s eruption isn’t the only instance in recent months ofpeople leaving their homes to get out of the path of an eruptingvolcano. When Mount Mayon in the Philippines began spewingash into the air in January, tens of thousands of people needed toevacuate. Over 100,000 people in northeast Bali were evacuatedin November when Indonesia’s Mount Agung began rumbling,and thousands of tourists also fled.
46. Which was Hawking’s discovery?
(A) neutron stars
(B) artificial intelligence
(C) black holes
(D) Homo sapiens

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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