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本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-09-14到2021-12-31
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Lesson 2 Skimming
1、 问题:Go through the passage “Body Language” within 1 minute, and answer the question that follows. (Tips: Read the first sentence of each paragraph.)Body Language What does scientific literature tell us about the idea that body language reflects our real feelings? One experiment carried out about 10 years ago by Ross Buck from Carnegie-Mellon University in Pennsylvania suggests that spontaneous facial expression is not a very good index of real emotional state. Buck and his colleagues tested the accuracy with which people could identify the emotions felt by another person. They presented one set of subjects with color slides involving a variety of emotionally-loaded visual stimuli – such as "scenic" slides (landscapes, etc), "maternal" slides (mothers and young children), disgusting slides (severe facial injuries and burns) and unusual slides (art objects). 点我阅读全文
和
之间放置另一个偏振片
，
绕沿光传播方向的轴旋转。设入射的自然光强度为
，求证：入射光通过这一组偏振片后，任一时刻的透射光强度
。（设
时，偏振片
[答案正确给3分，叙述有错或没有叙述扣1分]
[答案正确给3分，叙述有错或没有叙述扣1分]]
[答案正确给4分，叙述有错或没有叙述扣1分]
