您一定知道a和an的区别。在形容一个物品的时候,一般在前面加一个a,比如a box。但是单词如果是元音开头的话,就需要把a变成an,比如an apple。 但是有的时候,您会发现一些奇怪的例子。比如LED看起来应该是非元音字母开头,那么a LED应该是理所应当的正确说法了。可惜的是,an LED才是正确的说法。这是为什么呢? 其实...
OCS自主研发设计的LED闪光灯驱动芯片,通过采用精准恒流、高效率同步升压、开短路保护等创新技术,使该项目在同样芯片面积的基础上导通电阻大幅降低,实现1.7A大电流能力,最大输出功率可达到6.8W,最
has been optimized for improved compatibility to suitable IMSE™ (In-mold structural electronics) processing. All Measurement data of every single LED is made available at 20 and 50 mA via an imprinted data matrix code. This feature helps to reduce the optical measurement effort on customer ...
So it is that we live in a cold era, where names and faces represent two different levels of closeness, where working relationships occur only through the magic of email and where love can start or end by text message. An environment such ...
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back or ahend 录 C B. two hours )1. A. four hours 从广播、 D. one hour C. half an hour 到世界 ( B. with )2. A. between C. for D. at 感兴趣 C )3. A. years B. months 谈你的 D. weeks C. seasons C )4. A. a different B. the same C. an interesting D. a ...
Such active research can have another effect。 A 2014 survey conducted in Australia, Britain, and the United States by the University of Wisconsin-Madison found that young people’s reliance on social media led to greater political engagement。
–SOB (COB pro) process Dim to Warm LED strip: 420 LEDs total, with 210 pcs of 1800K and 210 pcs of 4000K, ensuring no pixelation. learn More → Quality system And Reliability test As an LED linear lighting manufacturer, we value the optimization of our quality management system and rel...
1852.Tombe’s father, Mukap, a man with a strong jaw and a wrinkled forehead, led us to his house, a low, round bamboo hut with no windows, with a door just big enough to get through, and with grass sticking out of the roof—thi...
AN LED LIGHT-MIXING DEVICE AND A LIGHTING ANDOR S 优质文献 相似文献 参考文献LED LIGHT-MIXING DEVICE AND A LIGHTING AND/OR SIGNAL INDICATION DEVICE A light-emitting diode (LED) light-mixing device, comprising a first LED, used to emit light of a first color; a second LED, used to emit ...