After investigating the behavior of( ),Galileo was able to use them as time measurement devices in many of his experiments. ( 章节：4 难度：2)
- A、pendulums
- B、establishments
- C、pendulum
- D、establishment
正确答案:A
答案解析:有
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After investigating the behavior of( ),Galileo was able to use them as time measurement devices in many of his experiments. ( 章节：4 难度：2)
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