题目内容
自然光垂直通过两块平行的偏振片，己知两块偏振片的偏振方向夹角α=45°，忽略偏振片的吸收，求透射光强与入射光强之比。
查看答案
搜索结果不匹配？点我反馈
更多问题
根据经典的能量按自由度均分原理，每个自由度的平均能量为（）
驾驶机动车通过漫水桥前要查明水的深度。
John: Eh, Lao Wang, long time no see. You seem to have put on a lot of weight.王：你好，约翰。好久没见啦!你来北京几年了听说别人都管你叫“有中国特色的老外”，这是怎么回事呀John: It’s been five years since I came to work here. People like me have become absorbed into local life. Our Chinese friends call us "foreigners with Chinese characteristics".王：刚才你叫我的时候，先喊了一声“哎”，这就很有中国特色。John: Well, it just came out. You know, whenever I feel exhausted from the Beijing heat and pressure of work, I often let out a loud ai-yoh, to express my stressful feeling at the time. The Chinese staff were first so impressed and then got used to it.王：那除了这些，你还学会了什么其他地道的中国交流方式John: We westerners are taught not to ask personal questions like, "How old are you" "How much do you earn" or "Are you married" But now we ask these questions freely and gaily.王：大家出去吃饭的时候，你们老外也都抢着买单吗John: Right. We never go Dutch. Why should we if all our Chinese friends around us never do so We also know that we don’t need to tip，which is common in the west. Think of the numerous times one eats out in China, it’s a substantial saving.王：听说你们买东西特别会讨价还价，比我们中国人还厉害。John: We will bargain everywhere and with anything we buy. Some of us even do so in supermarket without feeling embarrassed.王：你还挺入乡随俗的。John: Even if I love Chinese culture so much, there is one place I draw the line. I refuse to sit on a park bench, roll up my trouser legs to expose pale knees and then roll up my shirt to expose my stomach. I know this is a way some locals cool down on these hot, humid summer days. but I guess this is something I will not follow.
在新民主主义向社会主义过渡时期，中国民族资产阶级仍然具有的两面性是（）
微信支付 
支付宝支付