What is a black hole? A. A very large star. B. A place with no light. C. A region with extremely strong gravity. D. A planet with a strange shape. 相关知识点: 试题来源: 解析 C。本题考查对黑洞的理解。听力材料中提到黑洞是具有极强引力的区域。A 选项黑洞不是非常大的恒星;B 选项...
The interior secrets of black holes are guarded by a one-way light-trapping boundary called the event horizon.When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. An event horizon marks the boundary at the outer edge of a black hole. Th...
改错:What is a black hole? Well, it is difficult to answer the questionA. 相关知识点: 试题来源: 解析 【解析】supernova 名词,(天文)超新星1. 将as 改为since或者because。在表示原因的连接词中,只有as引导的原因状语从句不能位于主句之后,只能位于句首。2 .将adequate 改为inadequate,或者在are后加...
百度试题 结果1 题目 A black hole is an ___ (物体) that has such a large gravitational pull (引力), not even light can get away from it. 相关知识点: 试题来源: 解析 object 反馈 收藏
01 黑洞是什么 What Is a Black Hole? 黑洞就是一个引力很强的空间区域。任何东西——甚至连光——都因为不够快,不能从其内部逃离。虽然这一概念最初是在理论物理学家丰富的想象中被构思出来的,但现在我们已经在宇宙中发现了数百个黑洞,并且它们以百万计。尽管这些黑洞是不可见的,但它们以一种很容易被探测到...
D. A star with strong gravity. 相关知识点: 试题来源: 解析 C。中文解析:文章中明确提到“A black hole is a region of space where gravity is so strong that nothing, not even light, can escape.”,所以答案是 C。反馈 收藏
故A选项错误;根据第四段的第五句 "Scientists use satellites and telescopes in space to see the high-energy light" 可知,科学家们用的是太空望远镜而不是地球望远镜,故选项B错误;根据第四段的第一句 "A black hole can not be seen because strong gravity pulls all of the light into it" 可知黑洞...
47. A black hole is best described as___.A) a small piece of matter whose gravity is a million times that of EarthB) a huge area in outer space containing loose dust particles and stray atomsC) a small area of dense matter located in spaceD...
Stellar black holes are also created when two neutron stars, which are small, dense stars made of the core of dead stars, crash into each other, like bumper cars in space. The collision sends out a giant burst of radiation called a gamma-ray, as a new stellar black hole is formed. ...
A. It emits a lot of light. B. It has a very small mass. C. It has extremely strong gravity. D. It is E. asily visible to the naked eye. 相关知识点: 试题来源: 解析 C。解析:黑洞的特点是具有极强的引力,选项 A 错误,黑洞不发光;选项 B 错误,黑洞质量极大;选项 D 错误,黑洞肉眼不...