Which instrument is used to measure the relative humidity of the air ().
A hydrometer
B. A hygrometer
C. A spectrometer
D. A barograph
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中国古代只有技术发明,没有科学存在。()
参考答案：错误
一个善于认识自己和自我激励的人,知道自己能做什么和不能做什么,既不会不自量力,也不会低估自己的能力。()
Which of the following is NOT true according to Paragraph 3？
A. People who are not so skilled at their job benefit the most.
B. Music has the biggest effect on experts.
C. Newcomers find music distracting their work.
D. Older people spend less time listening to music.
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