A few examples of electromagnetic radiation are X-rays, gamma rays, radio waves, and visible light.Answer and Explanation: The major difference between the X-rays and gamma rays is their source of origin. X-rays get originated from the electrons that lie outside the...Become a member and...
解析 A [解析] 事实细节题。在文章第三段第一句中,对传统X光摄影使用范围的叙述是“只能分辨骨头与空气”(In addition,conventional X-rays generally differentiate only between bone and air,as in the chest and lungs.)故应选A是正确答案。反馈 收藏 ...
X-rays between 2.5 to 10 Krd and gamma-rays between 2.5 to 7.5 Krd increased the percentage germination of spores. The maximum stimulatory effect was observed at the dose of 10 Krd of X-rays and 5 Krd of gamma-rays. However percentage survival of vegetative colonies and sporulation was no...
The quality factor for x-rays, gamma rays and electrons assigned as one need to be revised. It is observed that as the energy decreases, mean lethal radiation dose (Do)decreases as well and become more potent. It is therefore proposed that radiation quality in biological systems should be as...
1. 1. It has been proved, when an ordinary beam of X- or 纬-rays, ( i.e., one not obtained by reflection from crystals), is scattered, that the rays scattered in any definite direction are of quite a different type to that of the primary rays. This type depends on that of the...
百度试题 题目What are the four characteristics of X-rays?? Par. 2Par. 5Par. 1Par. 3 相关知识点: 试题来源: 解析 Par. 3 反馈 收藏
空后的can cause skin burns,cancer or other damage to the body应该是“暴露于X光下或被X光辐射”的结果,exposure(暴露)符合题意,故[D]项为答案。“暴露于(危险物质)中”可用exposure to表达。disclosure意为“公开,透露,泄露,揭露”;exhibition意为“展示,显示”;contact意为“(尤指经常性的)联系,联络”,...
X射线的穿透能力,与下列哪项无关( )X-rays' penetration ability is independent of which of the following( ) A、物质的原子序数Atomic number of the material B、物质的厚度Thickness of the material C、射线的宽窄Width of X-ray beam D、射线的能量Energy of X-rays 点击查看答案进入...
Scientists are now trying to understand why this is true and how these variations in temperature relate to illness. Although the research is incomplete, most scientists agree that thermography holds definite possibilities for early detection of disease or for predicting an individual’s predisposition ...
第一段“Two powerful NASA telescopes have detected the oldest and most distant black hole ever found.Data collected via energetic X-rays by the Chandra X-ray Observatory and James Webb Space Telescope has helped astronomers s...