“They're crazy — I sent that room-deposit check," she said. “I'm going there and___this out.”I thought that was a___idea. I knew Mom could handle the___. She would get it solved quickly. But what I didn't___was that I was going with her.I tried to refuse, saying...
因此选择C项 4.A 细节理解题。根据第三段可知,糖为植物提供食物和能量,因此A项正确 思有所悟 A producer is a living thing that can make food on its own. The sun is the main source of energy for producers. They get light energy, and produce sugar and oxygen. 反馈 收藏 ...
The surface of Venus has never seemed very hospitable. Temperatures change around 470°C(900°F), the result of a runway greenhouse effect, and the pressure of its atmosphere, thick with carbon dioxide and sulfuric acid(硫酸), is some 90 times that of Earth’s. Lead(铅) would flow like...
aWe add carbon dioxide to the air when we burn things, especially fossil fuels.Fossil fuels are energy sources formed from the remains of plants and animals that lived millions of years ago.Coal,oil,and natural gas are all fossil fuels.People in the United States and other countries started ...
5. All scientists s to the view that the increase in the earth's temperature is due to the burning of fossil (燃料) like coal, natural gas to produce energy. 6. The problem begins when add huge q of extra carbon dioxide into the atmosphere. ...
Mosquitoes can detect carbon dioxide from 75 feet away.Both humans and animals produce carbon dioxide which signals female mosquitoes that a potential blood is near. Why do mosquito bites itch?When a mosquito bites, it injects chemicals to prevent the blood from clotting and reduce pain. These ...
(4) . They produce oxygen and absorb carbon dioxide(二氧化碳), a gas that animals, including humans, produce naturally as they breathe. But because carbon dioxide also comes from cars and factories, there is too much of it in the atmosphere, which is contributing to global warming. If every...
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.Scientists believe human life would be impossible if there were no trees on Earth.Trees are a major source (来源) of ...
In addition, not only does the ocean produce much oxygen, but it also absorbs much carbon dioxide, which remarkably contributes to regulating the Earth's climate. Also, vast amounts of medicinal products come from the ocean, including ingredients that help fight cancer and heart disease. However...
They consume carbon dioxide and produce oxygen. 3 For example, a fully grown tree produces oxygen which is sufficient for10 people for a complete year. Also, they act as filters of the air that we breathe. Trees are of commercial importance. Trees satisfy the need of fuel for cooking in...