What is the role of the atmosphere in protecting the Earth? A. Blocks harmful radiation B. Provides oxygen for breathing C. Regulates temperature D. All of the above 相关知识点: 试题来源: 解析 D。大气层可以阻挡有害辐射、提供呼吸所需的氧气以及调节温度。
The inner ear is a network of channels containing fluid that moves in response to sound or movement. To perform the function of hearing, the ear converts the energy of pressure waves moving through the air into nerve impulses that the brain perceives as sound. Vibrating objects, such as ...
Earth has an atmosphere. The atmosphere protects us from harmful rays. What is the atmosphere made of? A. Water vapor B. Gases C. Soil D. Rocks 相关知识点: 试题来源: 解析 B。解析:地球有大气层,大气层保护我们免受有害射线的伤害。大气层是由气体组成的。选项 A 水蒸气只是大气层的一部分...
What is the main gas in the Earth's atmosphere? A. Oxygen B. Nitrogen C. Carbon dioxide D. Hydrogen 相关知识点: 试题来源: 解析 B。解析:地球大气中的主要气体是氮气。文章中有对大气成分的介绍。选项 A 氧气含量比氮气少。选项 C 二氧化碳是温室气体,但不是主要气体。选项 D 氢气在大气中的含量...
The atmosphere protects the earth. What is the atmosphere made of? A. Gas and dust B. Water and fire C. Earth and moon D. Stars and gas 相关知识点: 试题来源: 解析 A。本题考查对大气层组成的了解,大气层由气体和尘埃组成。B 选项水和火不对;C 选项地球和月亮不对;D 选项星星和气体不对...
The Earth is surrounded by a layer of gas called the atmosphere. What is one of the important functions of the atmosphere? A. To make the Earth look blue from space. B. To protect the Earth from harmful radiation. C. To make it easier for people to travel by plane. D. To keep ...
What is the second most abundant gas in the Earth's atmosphere? A. Oxygen B. Nitrogen C. Carbon dioxide D. Argon 相关知识点: 试题来源: 解析 A。解析:地球大气中第二丰富的气体是氧气,占大气总量约21%。氮气是最丰富的,约占78%。二氧化碳含量较少,氩气含量也比氧气少。
Which atmospheric layer is closest to the Earth's surface? In what layer of the atmosphere does global warming occur? Which atmospheric layer is closest to the Earth's crust? In which layer of the atmosphere does weather occur? Which is the lowest layer of the atmosphere?
A. Only the amount of rainfall. B. Atmospheric pressure, temperature and humidity. C. The number of clouds in the sky. D. The speed of the E. arth's rotation. 相关知识点: 试题来源: 解析 B。解析:科学家通过发射气象气球主要收集大气压力、温度和湿度等数据。A选项气象气球不仅仅收集降雨量。
题目The warming of Earth's climate(气候) is called global(全球的)warming .If global warming carries on,many plants and animals living today on the Earth could have problems surviving(生存).It could also mean more droughts(干旱)and floods(洪水).Over the last one hundred ...