The sun is in the center of the solar system.It is a hot and bright star.A star gives off heat and light.The sun is the closest star to the earth.That's why it looks different from other stars.Most stars look small.We can see them only at night because the...
A.burn B.run out C.give off heat D.get weak 5.Which of the following is NOT TRUE according to the passage? A.We might see that many stars look larger than others with a telescope B.We might see that some stars that look white are really red and blue with a telescope. C.We can...
You might find it hard to imagine that stars die. After all, our sun is a star. Year after year we see it up in the sky, burning brightly and giving us heat and light. The Sun certainly doesn’t seem to be getting old or weak. But stars do burn out and die after billions of ...
Compact objects refer to a group of hypothetical stars that do not have electrons, neutrons, and protons. These objects are characterized by extreme conditions and are prevented from collapsing by gravity due to degeneracy pressure or quantum properties. Examples of compact objects include wormholes, ...
The vast majority of cultural heritage objects consist of materials that can be subjected to biodeterioration. Currently, there is significant number of publications showing which materials are capable of destroying certain organisms, and what conservati
Stars and planets are born in similar ways but usually under different circumstances. If you have a cloud of dust and gas, a star can be born when enough material gathers in one spot that the pressure and heat kickstarts hydrogen nuclear fusion in its core. Planets often form out of the ...
aUse light colored paints and interiors to reflect lighting. 使用淡色的油漆和内部反射照明设备。[translate] aSome people think that university should not provide theoretical knowledge,but to give practical training to benefit society. Do you agree or disagree. Use your own experience and knowledge to...
However, in these experiments, it was observed that the longer the treatment time, the more contact was lost between the gel and the object’s surface due to the gel drying. To optimize contact between the gel and the surface of the object, a drop of solution (KNO3 1%w) was placed on...
a这个教学方案不错,因为它提高了学生的自学能力,使学生不再那么依赖老师 This teaching plan is good, because it enhanced the student to study independently ability, caused the student no longer that to rely on teacher[translate] aBut I've heard one of you, and I'm gonna make your head burn ...
What happens to the colors of light that are not reflected? They are absorbed (吸收) by the object. The darker the color is, the less light is reflected and the more light is taken in. Light that is absorbed is turned into heat. For this reason, dark-colored clothes are warmer in th...