1. Invar is valuable for making pendulums because _______.

　　A. it can hardly change its shape or size as temperature changes.

　　B. it will change its dimensions without the change of temperature.

　　C. its time of vibration doesn’t change if its length changes.

　　D. its time of vibration does not change if its length changes.

　　2. As water gets colder after reaching the temperature of 30℃. it will _______.

　　A. contract

　　B. shrink

　　C. expand

　　D. freeze

　　3. Which of the following statements is true, according to this passage?

　　A. Only invar can be used to make a thermometer.

　　B. Only water can be used to make a thermometer.

　　C. Both invar and water can be used to make a thermometer.

　　D. Neither invar nor water can be used to make a thermometer.

　　4. The best title of this passage is most likely to be

　　_____.

　　A. Temperature Measurement

　　B. Two Exceptions

　　C. Uses of Invar

　　D. Properties of Water

　　【参考答案】1—4、ACDB

　　阅读理解-------D

　　Lots of people have hobbies. Some people collect old coins or foreign stamps; some do needlework; others spend most of their spare time on a particular sport.

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