UV是“Ultraviolet”(紫外线)的缩写,“rays”指光线,因此“UV rays”对应“紫外线”。 选项分析: A. 沙土(Sand/Soil)——与紫外线无关。 B. 闪电(Lightning)——可能伴随电磁波,但非紫外线缩写。 C. 紫外线(Ultraviolet)——唯一正确匹配。 D. 超声波(Ultrasonic)——缩写为“US”,与“UV”无关。 题目...
What do the underlined words “UV rays” mean?A.沙尘B . 闪电C.紫外线D. 超声波 相关知识点: 试题来源: 解析 C UV是Ultraviolet的缩写,意为紫外线。A选项沙尘与光线无关;B选项闪电属于天气现象;D选项超声波为声波,而UV rays属于电磁波中的紫外线,因此正确选项为C。
UPF clothing works by blocking the sun’s harmful UV rays via the fabric itself rather than adding a coating to the top. “When it’s hot and humid out, clothing can be uncomfortable,” explains Beckham. “The challenge is to design and construct clothing that is as light and breathable ...
UVA rays have a lower amount of energy and a longer wavelength than UVB rays. They can enter the middle layer of your skin called the dermis. UVA rays form 95% of the UV radiation which reaches the earth. They have a role to play in the formation of some types ofskin cancers. ...
LEDs have no moving parts of filaments that can break or fail. No UV rays or infrared radiation— Because LEDs do not emit harmful UV rays that can degrade materials or fade paints and dyes, they're ideal for use in retail stores, museums, and art galleries. Long source life— LEDs ...
百度试题 结果1 题目优能中学初中英语 中学新概念系列4. What do the underlined words “UV rays” mean? D. 超声波 A. 沙尘 B. 闪电 C. 紫外线 相关知识点: 试题来源: 解析 C 反馈 收藏
百度试题 结果1 题目What do the underlined phase “UV rays” mean in Chinese? A. 闪电 B. 沙尘 . C. 紫外线 D. 超声波 相关知识点: 试题来源: 解析 C 反馈 收藏
How are gamma rays produced? What technology uses gamma rays? What can gamma rays pass through? What gives off gamma rays? What is alpha radiation made up of? What are the properties of gamma rays? What is gamma radiation? Where do gamma rays come from?
A number of sunscreens have tanning powder to help the skin to darken or tan; however, tanning powder does not provide protection from UV rays.Depending on the mode of action, sunscreens can be classified into physical sunscreens (i.e., those that reflect the sunlight) or chemical sunscreens...
Ultraviolet (UV) rays can penetrate clouds, so just because you don’t feel the sunshine doesn’t mean your skin isn’t at risk of photoaging (premature aging caused by exposure to UV rays). It’s important to protect your skin with sunscreen all day, every day. Whether you have acne-...