例二(剑五P89 Flawed Beauty: the problem with toughened glass)
Questions 18-23
Complete the summary with the list of words A-P below.
Toughened glass
Toughened glass is favored by architects because it is much stronger than ordinary glass, and the fragments are not as 18________ when it breaks. However, it has one disadvantage: it can shatter 19________. This fault is a result of the manufacturing process. Ordinary glass is first heated, then cooled very 20________. The outer layer 21________ before the inner layer, and the tension between the two layers……These are unstable, and can expand suddenly, particularly if the weather is 22________. If this happens, the pane of glass may break. The frequency with which such problems occur is 23________ by glass experts…….
解题：根据题目中的第一句话我们能猜出toughened glass为钢化玻璃，18题中讲当钢化玻璃破碎时，它的碎片不像普通玻璃一样____?根据常识我们知道钢化玻璃破碎时碎片不那么锋利，所以此题答案为F;同样根据常识，钢化玻璃有时会突然破碎，19题答案为I;20题考生若不确定答案可以利用定位信息到文章中定位答案，答案为C;21题我们又可以利用常识“热胀冷缩”，判断肯定外层比内层先收缩，所以答案为K;22题同样利用“热胀冷缩”的常识，肯定是天暖和的时候才会膨胀，因此确定答案为E;23题根据常识无法确定答案，考生利用定位信息到文章中定位确定答案，答案为L。
