百度试题 结果1 题目LEDs are more environmentally friendly than incandescent bulbs. A. TRUE B. FALSE C. Not Given 相关知识点: 试题来源: 解析 A 反馈 收藏
For many years, the lightbulb as we know it were the cheap incandescent light bulbs – you know the buy 4 for around $3. Then several years back, CFLs were introduced. These are the funny shaped bulbs that cost more money but promised to save you money. For a while they lit your hou...
AWashington Timeseditorialdeclares, “Time to stock up on light bulbs: Government ban on mercury-free fixtures takes effect Jan. 1.” Contrastingly, NPRcallssuch statements “rumors” and says that incandescent bulbs will merely be more efficient—and the only difference we’ll notice is that our...
Why Republicans Are Incandescent over Switch to Low-Energy Light BulbsRead the full-text online article and more details about "Why Republicans Are Incandescent over Switch to Low-Energy Light Bulbs" - The Independent (London, England), July 13, 2011The Independent (London, England)...
aI may be interested in your high power bay light (200W LED). We are looking for LED bulbs to replace Phillips incandescent bulbs that are currently being used in North American hockey rinks. Would this bulb produce enough light to accommodate this type of use? 我也许是对您威力强大的海湾光...
3.如果not only... but also连接两个主语，则句子不用倒装。此时还要注意，谓语动词在人称和数上应与后面一个主语保持一致。例如： Not only he but also you are wrong.不但他错了，你也错了。 4.此结构中的also有时可省略。例如： The Great Wall was made not only of stone and earth,...
aLater, Holonyak started looking into how semiconductors could be used to generate light. But while his colleagues were looking at how to generate invisible light, he wanted to generate visible light. The LEDs he invented in 1962 now last about 10 times longer than incandescent bulbs, and are...
● Fluorescent lamps also have a longer lifespan than incandescent bulbs. ● Additionally, fluorescent lamps are versatile for various lighting applications. Fluorescent Lights Downsides ● They contain a small amount of mercury, making them more challenging to dispose of properly. ● In addition, the...
Designed to alter the brightness, dimmer switches are very particular about their bulbs. Typical dimmer switches are made for incandescent and halogen bulbs. Thus, this problem might arise if you use the incorrect switch with a fluorescent bulb.LED bulbsalso require their specific dimmer switches. ...
The problem with incandescent light bulbs is that the heat wastes a lot of electricity. Heat is not light, and the purpose of the light bulb is light, so all of the energy spent creating heat is a waste. Incandescent bulbs are therefore very inefficient. They produce perhaps 15 lumens per...