A．good marks result from high-quality study

　　B．findings probably vary in different areas

　　C．physical activity will spread all over the world

　　D．academic performance depends on the surroundings

　　75．What's the purpose of writing the passage?

　　A．To call our attention to the sports at school．

　　B．To introduce all types of physical activities．

　　C．To represent the academic performance．

　　D．To improve students' health ．

　　【参考答案】72—75、BDBA

　　A

　　Temperature is measured by means of a 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 of a 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, 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 of a pond. As the water on top gets colder, it shrinks; and so, volume for volume, it becomes heavier and sinks. This goes on until all the pond is at 30℃, but after that, as the water becomes 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 become a solid block of ice in the end. This would not worry people who live in hot climates, but it would be very serious for those who live in cold climates, especially for those who want to break the ice and catch fish which live in the cold water beneath.

【2017届山西省阳城县高考英语阅读理解一轮优选训练（3）】相关文章：

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (23)

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（19）附答案

★ （全国通用）2014届高考英语一轮单元复习 限时强化训练十二

★ 2017年高考英语二轮复习精品资料：专题16 书面表达（押题专练）（原卷版）

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（8）及答案

★ 辽宁省辽阳市2014高考英语单项选择一轮（暑假）训练（14）附答案

★ 贵州省贵阳市2014高考英语（新人教版）一轮阅读训练（27）附答案

★ 2017届高考英语二轮复习课时训练：7（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：创新押题（含解析）

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（12）附答案