根据第一段"Carbon dioxide is bad-it causes global warming. Carbon dioxide is political-U. S. officials want laws to reduce emissions(排放)into the atmosphere. But William McDonough says all that is wrong. "Carbon is not the enemy, "he said in an important speech at the recent SXSW Eco ...
Carbon dioxide is necessary for photosynthesis (光合作用). In the process, plants use energy from the sun to turn water and carbon dioxide into sugar (碳有助于形成生物体内的蛋白质和DNA。在大气中,它与两个氧原子结合形成二氧化碳。二氧化碳是光合作用所必需的。在这个过程中,植物利用来自太阳的能量将...
Carbon dioxide is a molecule with the molecular formula CO2. The linear molecule consists of a carbon atom that is doubly bonded to two oxygen atoms, 0=C=0. Although carbon dioxide mainly consists in the gaseous form, it also has a solid and a liquid form. It can only be solid when ...
What is carbon dioxide? Carbon dioxide is a naturally occurring gas that is measured in parts per million (ppm). A by-product of our metabolic process – we add CO2 into the air every time we exhale – it’s often used as an indicator of adequate building ventilation. ...
C. Carbon dioxide is found reaching a quite high level. D. Measurement of carbon dioxide is symbolic in human history. 相关知识点: 试题来源: 解析 C 正确答案:C 解析:报道首句便指出大气中的二氧化碳含量达到了新高(have reached a symbolic high),因此C项正确。反馈 收藏 ...
The meaning of CARBON DIOXIDE is a heavy colorless gas CO2 that does not support combustion, dissolves in water to form carbonic acid, is formed especially in animal respiration and in the decay or combustion of animal and vegetable matter, is absorbed f
Carbon dioxide capacity means how much carbon dioxide can be released by a country or the world under the limit which will do harm to the balance of environment and cause drastic consequence. The atmosphere is consist of 78% nitrogen, 21% oxygen and a little bit of carbon dioxide...
What is CO2? Carbon dioxide (or CO2) is a colourless and odourless naturally occurring gas in the earth’s atmosphere which is made up of one carbon atom and two oxygen atoms. As a greenhouse gas (GHG), it traps heat, making sure the planet isn’t uninhabitably cold. However, fast ...
【题文】In the atmosphere, carbon dioxide acts rather like a one-way mirror or the glass in the roof of a greenhouse which allows the sun's rays to enter but prevents the heat from escaping. According to a weather expert' s prediction, the atmosphere will be 3℃ warmer in the year 20...
WHAT IS CO2? Carbon Dioxide or CO2is a greenhouse gas that is natural and harmless in small quantities, but as levels rise it can affect productivity and sleep. Most commonly produced indoors by the air we exhale, CO2levels concentrate indoors with less ventilation. ...