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

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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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