题目The sun is a star. It gives us light and heat. How far is the sun from the earth? A. 150 million kilometers B. 100 million kilometers C. 200 million kilometers D. 50 million kilometers 相关知识点: 试题来源: 解析 A。本题考查对太阳与地球距离的常识,太阳距离地球约 1.5 亿...
The sun is a star. It gives us light and heat. How far is the sun from Earth? A. 150 million kilometers. B. 500 million kilometers. C. 1 billion kilometers. D. 5 billion kilometers. 相关知识点: 试题来源: 解析 A。太阳距离地球约 1.5 亿千米。选项 B、C、D 的距离与实际不符。
The sun is a star. It gives off light and heat. The Earth orbits around the sun. How does the Earth move around the sun? A. In a straight line. B. In a circle. C. In an oval. D. Randomly. 相关知识点: 试题来源: 解析 C。科普知识中地球绕太阳的轨道是椭圆形。选项 A 直线错误...
To put it into perspective, scientists estimate that the Sun produces about 3.8 x 10²⁶ joules of energy every second. On Earth in 2021, the total amount of energy consumed by humans was about 5.8 x 10²⁰ joules. This means that every second of every day, the Sun makes about ...
If the sun has enough power to warm and light the whole earth,it must have enough power to do other things,too.Can we use the sun’s abundant energy to supply electricity,or at least to perform the functions which electricity or other types of power usually perform?The answer is yes....
But it’s a real marvel: The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. It can also cause cell death and make us blind. It could fit 1.3 million Earths inside its sphere [source: SpaceDaily]. It produces poem-worthy ...
The sun creates energy in the form of heat and light. Even though the sun is a ball of gases, it is made up of several layers. The main layers are the center. There are also other layers. The sun produces hug energy. Its energy mainly comes from its center. The sun is the source...
In space, the sun rises every 90 minutes. It is hard for astronauts to get used to this light-dark cycle when they sleep. Now they have individual seeping pods (分离舱) that help shut out some of the light. Sill, studies have found that most astronauts only sleep about six hours each...
2.Sun's由空 的名 “light”可知,此 用名 所 有格形式,表示 “太阳光” 。 故填Sun's。 3.Usually结构 , 修饰整个句子。 故填 Usually。 4.warmth的 “the” ,。填warmth。 5. in sit in the sun"光下"。 in。 6. produces“The silicon” , 时态为一般现在时。 故填produces。 7. a a ...
Especially for athletes exercising in the heat, your level of thirst isn't a reliable way of determining whether you're hydrated, so it's important to hydrate no matter how you're feeling for health and performance. Check your pee A very light yellow color means you're likely getting eno...