2. 外语
  3. According to the passage, tornadoes can destroy buildings because the ______. The pressures on a building during tornado can be

According to the passage, tornadoes can destroy buildings because the ______. The pressures on a building during tornado can be

admin2009-09-12  50
问题 According to the passage, tornadoes can destroy buildings because the ______.
The pressures on a building during tornado can be relieved by ______.
选项 A、dosing the cellar
B、opening the window
C、using a fan for air circulation
D、strengthening the roof and walls
答案B
解析 细节题。参见第四段第一、二句：If the windows are open．．．outside the building．(若打开楼房窗户，室内的一些空气可以流出。这将使楼房内外压力得以平衡。)
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