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随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒14. physical adj. 1) concerning the body rather than the mind; 2) concerning the material things that you can see and touch; 3) [always before a noun] concerning the natural formation of the Earth’s survace; 4) according to the law of nature Playing basketball is a form of physical exercise.
These are physical changes while those are chemical changes.
I have no idea how large the physical universe is.
There may be a physical explanation for these strange happenings.
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