2014高考英语完形填空专题训练精品题（96）及答案.doc

2014高考英语完形填空专题训练精品题（96）及答案.doc2014 高考英语完形填空专题训练精品题( 96 )及答案 A Temperature is measured by means ofa thermometer ( 温度计). One general form of thermometer depends upon the fact that most solids and liquids expand as their temperature rises. There are one or two exceptions. There is, for instance, a kind of steel called invar (from “ invariable ”) which does not change its dimensions as temperature changes; it is valuable for making pendulums ( 钟摆), since, if the length ofa pendulum changes, its time of vibration changes. It is also used for making very accurate measuring scales. In both cases, then, changes of atmospheric temperature have no effect if invar is used. Another exception is that very odd liquid, water, which has many strange properties (特性). As water gets colder it contracts ( 收缩), which is ordinary behavior, until it reaches the temperature of 30 ℃. above freezing point. After that, as it gets colder, it expands. This is fortunate---for considering the freezing ofa pond. As the water on top gets colder, it shrinks; and so, volume for volume, it es heavier and sinks. This goes on until all the pond is at 30 ℃, but after that, as the water es colder it expands. Therefore the colder water stays on top and freezes, covering the pond with ice. If the water went on contracting down to the freezing point, the pond would e a solid block of ice in the end. This would not worry people who live in hot climat