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...
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...
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...
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。
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。
This book says that our world is in danger.(A) It is vital that we do something to save the earth.First of all, what are the threats to our environment? The authors ask us to‘imagine the earth inside a kind of greenhouse with the atmosphere around it acting like the glass, letting...
3.Researchers and many scientists are concerned that the earth's climate and atmosphere are becoming warmer.What scientists do agree on is that the temperature will continue to increase if measures are not taken to reduce pollution and emissions from c
A warmer planet doesn’t just raise temperatures. From wildfires to flooding to coral bleaching, here are some real-world implications.
The atmosphere protects the Earth from harmful radiation. What kind of radiation does it mainly block? A. Ultraviolet radiation B. Infrared radiation C. Gamma radiation D. Microwave radiation 相关知识点: 试题来源: 解析 A。解析:大气层主要阻挡紫外线辐射。
Astronomers have peeked into the atmosphere of a "super-Earth"for the first time. Their analysis...BotkinKowacki, Eva