X-rays are a form of electromagnetic radiation that have wavelengths of between 0.01 and 10 nanometers. While x-rays occur naturally, they can also be produced artificially.Answer and Explanation: X-rays are primarily used by the medical community to creates images of organs, tissue, and other...
In some languages, these rays are actually referred to as Röntgen rays. His landmark paper in the field was titled "On a New Kind of Radiation." Because of the tiny wavelength of x-rays, they are useful for imaging small structures, such as individual molecules. This research field is...
(C)25.What are the X-rays?相关知识点: 试题来源: 解析 X射线是一种电磁辐射,其波长介于紫外线和伽马射线之间。X射线具有很强的穿透力,能够穿透许多可见光无法穿透的物质,如肌肉和软组织,但会被密度较高的物质(如骨骼和金属)吸收。这一特性使得X射线在医学诊断中得到了广泛应用。 X射线是一种电磁辐射,其...
Rntgen observed that, on hitting the positive plate, the electrons produced some penetrating radiation, which could be detected outside the glass tube by its ability to blacken a photographic film. He called these new rays "X rays", with the "X" standing for something unknown....
X-rays can penetrate any object because of their very high frequency and energy. Because of this property, X-rays are used in various medical examinations, including those that check for pneumonia, check for broken bones, and check for breast cancer in mammograms....
Hard X-rays are very high frequency rays. They are designed to destroy the molecules within specific cells, thus destroying tissue. Hard X-rays are used inradiotherapy,a treatment for cancer. The high voltage necessary to generate hard X-rays is usually produced using cyclotrons or synchrotrons...
This machine is called a muon detector. Muons are subatomic particles that result from cosmic rays. 这个机器叫做介子探测器。介子是起源于宇宙射线的亚原子粒子。 OK, let me start over. Cosmic rays aren’t actually "rays"--they’re basically protons, zipping through outer space at close to light...
“Twilight rays” are but one of several viewing treats for the liminal time between day and night
18. What are the good seeds confirmed by? B A. Containers. B. X-rays. C. Freezers.19. Why are seeds stored in frozen environment? A. To be preserved for long. A B. To tackle climate change. C. To safeguard food supply.20. What is the speech mainly about? B A. Where seeds a...
二、用括号内所给词的适当形式填空。1. What do (do) your X-rays show?2. What are you worried (worry) about?3. She had (have) better go and see a doctor.4. We are going to visit (visit) Jack this afternoon.5. Could you please help me (I) with my lessons? 相关知识点: 试...