1)Across cell membranes, oxygen and carbon dioxide move or transport via simple diffusion, and no...
Fish ___ oxygen through their gills(鳃). III.单项填空: () 1. Air pollution can affect humans by___ sore eyes and respiratory problems, especially in children and___. A. cause, the old B. causing, the older C. causing, the elderly D. cause, the elderly ()...
How is the balance of carbon dioxide and oxygen maintained in the atmosphere? View Solution How is oxygen and carbon dioxide transported in human beings? View Solution How is oxygen and carbon dioxide transported in human beings? View Solution How is oxygen and carbon dioxide transported in human...
If you put a molecule of pure carbon dioxide together with hydrogen and oxygen atoms, you would soon find that these two would be attracted to each other due to their orbital radii around the nucleus of the carbon dioxide molecule. The presence of oxygen would push the carbon dioxide molecule...
A. Absorb oxygen and release carbon dioxide. B. Absorb carbon dioxide and release oxygen. C. Absorb water and release carbon dioxide. D. Absorb carbon dioxide and release water. 相关知识点: 试题来源: 解析 B。解析:文章提到树木吸收二氧化碳并释放氧气,A 选项弄反了;C 和 D 选项错误。反馈...
The process by which carbon dioxide and oxygen are transferred does not depend on___.A.the presence of nitrogen in the bloodB.the muscles of the thoracic cavityC.the flow of bloodD.the moisture in the air sac linings的答案是什么.用刷刷题APP,拍照搜索
When pure oxygen is condensed, why does it turn into a liquid? Answer and Explanation: The physical state of matter (solid, liquid or gas) depends on intermolecular distance. The intermolecular distance is the result of a balance of... ...
Plants absorb carbon dioxide and convert it into their own tissue, which serves as the basic food supply for all of animal life (including human beings, of course). In the process they release oxygen, which is also necessary for all animal life. But here is what this apparently harmless ...
Humans and animals need oxygen to exist.Without it,most living things will die.But where does oxygen come from?Trees.Trees can take in much carbon dioxide (二氧化碳) which may be bad for our environment and produce oxygen for us to breathe. All people know that trees are important to us....
根据Trees can take in much carbon dioxide (二氧化碳) which may be bad for our environment and produce oxygen for us to breathe.可知二氧化碳对人们的环境会带来危害。故应该选D。 【3】D细节理解题。根据They help protect the soil(土壤).可知树木可以帮着保护土壤。故选D。 【4】D综合理解题。通读...