题干

如图是小金研究电动机转动是否对小灯泡的亮度有影响的电路图。开始小金先抓住转轴合上开关,观察小灯泡的亮度;接着放开转轴让电动机转动,继续观察小灯泡亮度的变化(已知:小灯泡的电阻为R,电动机线圈电阻为r,电源电压为U)。由此请你回答:

上一题 下一题 0.0难度 选择题 更新时间:2016-08-10 03:57:44

答案(点此获取答案解析)

同类题4

阅读理解

    Hollywood's only Chinese-American superhero has stirred up heated debate on social media after she spoke out against discrimination in American show business.

    Chloe Bennet, a Chinese-American actress who stars in Marvel's trending TV series Agents of S.H.I.E.L.D., explained on social media why she changed her last name from Wong to Bennet, arguing that Hollywood is “racist” and wouldn't cast her with a last name that made them “uncomfortable.”

    “Changing my last name doesn't change the fact that my BLOOD is half Chinese, that I lived in China, speak Mandarin, or that I was culturally raised both American and Chinese,” replied Bennet.

    Bennet's remarks come after Ed Skrein stepped down from his role as Major Ben Daimion in the upcoming Hellboy movie for fear that his participation would be “whitewashing” a character of Asian descent(后裔).

    Racial barriers have been an essential problem in Hollywood. According to research conducted by the University of Southern California in 2015, nearly three-quarters of all characters in the top 100 films of 2014 were white, while only 5.3 percent of Asian artists can share the same privilege. In another report released in 2017, only 3.4 percent of over 1,000 surveyed films had an Asian director.

    “Asian artists can hardly stand out in Hollywood. Most roles starred by Asians are fixed and stereotyped, as if all Asians are good at math and martial arts. There is an invisible discrimination lurking(潜伏) in show business, as the difference of your skin color may bring disparity in your income and opportunities,” said Alex She, a New York-based Chinese-American photographer and movie maker.

    Bennet's experience has led to heated debate on both Chinese and foreign social media.