高考英語閱讀理解練習及答案

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2016年高考英語閱讀理解練習及答案

　　Forces other than damaging winds are also atwork inside tornadoes(龍卷風). Sometimes, as thewind passes a house, the walls and ceiling burstapart as if a bomb had gone off inside. Thisexplosion is caused by the low air pressure at thecenter of a tornado.

2016年高考英語閱讀理解練習及答案

　　The pressure at the center of a tornado isusually 13 pounds per square inch. However, inside the house the air pressure is normal, about15 pounds per square inch. The difference of 2 pounds per square inch between the inside andoutside pressure may not seem like much. But suppose a tornado passes over a smallbuilding that measures 20 by 10 by 10 feet. On each square inch ofthe building, there is 2pounds of pressure from the inside that is not balanced by air pressure outside the building.On the ceiling, that adds up to an unbalanced pressure of 57600 pounds. The pressure ofthe four walls adds up to 172800 pounds.

　　If windows are open in the building, some of the inside air will rush out through them. Thiswill balance the pressure inside and outside the building. But if the windows are shut tightly,the huge inside pressure may cause the building to burst.

　　Unfortunately, heavy rain often occurs in the storms that later produce tornadoes, sopeople often shut their windows. This may cause far worse damage later.

　　1.What did the paragraph before this passage most probably discuss?

　　A. Measuring rainfall from a storm

　　B. The powerful winds of tornadoes.

　　C. The kinds of damage caused by explosions

　　D. Repairing the damage from tornadoes.

　　2.Which of the following is the main topic of the passage?

　　A. How tornadoes can be prevented.

　　B. When tornadoes usually occur.

　　C. Where tornadoes are formed.

　　D. Why tornadoes cause so much damage.

　　3.Tornadoes can destroy buildings because the______.

　　A. force of a tornado increases the air pressure in a building.