解析 his 题目考查代词的正确形式。原句结构为“He tries ___ best”,需填入形容词性物主代词修饰“best”。括号中给出的代词是“he”,其形容词性物主代词为“his”。固定搭配“try one's best”中,“one's”需与主语“He”对应,故填“his”。 <知识点>:形容词性物主代词、固定搭配 反馈 ...
An Amazon customer called this smart light bulb one of the best on the market: "These are some top of the line smart bulbs. Can you find cheaper bulbs as far as costs is concerned? Yes, you can. But the saying goes, 'You get what you pay for.' And that holds true with these bu...
Energy-saving light bulbs can ___ electricity and help protect the environment. A. save B. waste C. use D. consume 相关知识点: 试题来源: 解析 A。“save”节省;“waste”浪费;“use”使用;“consume”消耗。节能灯泡可以节省电并有助于保护环境,所以选 A。反馈...
Although the act didn't ban the use, purchase, sale or manufacture of incandescent bulbs, it did require household light bulbs to have 25 percent greater efficiency (which means 25 percent less energy use) than the traditional bulbs that used between 40 and 100 watts of electricity. The ...
Lasts 13.1 years Where will you be in over a decade? Based on 3 hours per day usage Mercury free Unlike other bulbs, LEDs don't contain harmful mercury. Durable & strong Its solid structure means shattered light bulbs are a thing of the past....
In order to save electricity, we should use energy-efficient light bulbs. Which word means “energy-efficient”? A. powerful B. economical C. bright D. colorful 相关知识点: 试题来源: 解析 B。解析:本题考查词汇理解。powerful 强大的;economical 节能的;bright 明亮的;colorful 多彩的。根据句意...
High-Power LEDs can generate so much waste heat that they'll damage themselves without proper cooling. Don't let the term "waste heat" fool you, though, these devices are still incredibly efficient compared to conventional bulbs. To control, you could use aconstant current LED driver. ...
百度试题 结果1 题目It is said that the new light bulbs ___ (consumption) less electricity.相关知识点: 试题来源: 解析 consume 反馈 收藏
Since LEDs use far less energy than incandescent bulbs, they require less fossil fuel (which is the source of most electricity) to light them. Consequently, they add fewer pollutants to the air. Experts say that lighting 100 building exit signs with LEDs can save thousands of dollars in elect...
Fancy switches require a small current to remain on standby. LEDs draw some current from these switches when switched off, shining faintly.A similar problem arises when you connect electronic dimmers to your light bulbs. Electronic dimmers require adequate current to function properly. The bulb ...