Topic content:
Since 2009, May 12 every year has been China's "Disaster Prevention and Reduction Day", which is conducive to popularizing the skills of all people in earthquake prevention and mitigation and disaster avoidance and self-help, and minimizing the loss of disasters. If you are in a building during an earthquake, how should you avoid earthquakes ()
A. Jump off a building
B. Hide under the window
C. Take the elevator downstairs
D. Cover your head with pillows and hide under the bed and table nearby
Best answer:
D
Answer analysis:
When an earthquake occurs, if we are in a building, the first thing we should do is to protect our heads, find a place that can form a triangle space, such as under a bed or table, and try to reduce the center of gravity, so as to minimize the loss of disasters; Do not hide under the window. Remember not to jump off a building or take an elevator. Therefore, choose D.
Test core:
Plate drift theory: a theory that explains the crustal movement and the distribution and evolution of land and sea. The large-scale horizontal movement between continents and between continents and ocean basins is called continental drift. According to the theory of continental drift, all continents on the earth were once unified huge landmasses before the Mesozoic era, called Pangaea or United Ancient Land. From the beginning of the Mesozoic era, Pangaea split and drifted, gradually reaching the current position. Land reclamation: Land reclamation refers to the transformation of the original sea area, lake area or river bank into land. For coastal cities with more mountains and less flat land, land reclamation is an effective way to create flat land for urban development. Many large coastal cities, such as Tokyo, Hong Kong, Macao and Shenzhen, use this method to make flat land. Volcanic seismic zone: There are two major seismic zones around the world: the Pacific Rim seismic zone and the Mediterranean Himalayan seismic zone. The former concentrates more than 80% of the shallow earthquakes (0-70km), almost all of the medium earthquakes (70-300km) and deep earthquakes (300-700km) in the world. It is distributed around the Pacific Ocean, starting from the southern end of South America, extending northward along the west coast to Alaska in North America, and turning westward through Aleutian Islands, Kamchatka Peninsula, Kuril Islands to Japan.