In an environmental protection activity, we plant many trees. What is the part of a tree that absorbs sunlight? A. root B. trunk C. branch D. leaf 相关知识点: 试题来源: 解析 D。“root(根)”主要吸收水分和养分;“trunk(树干)”主要起支撑作用;“branch(树枝)”主要生长叶子和果实等;“leaf...
A. It records different-coloured bands of sunlight. B. It flies over the crops with a computer. C. It absorbs the sunlight reflected off the crops. D. It is like a smartphone with wings. 相关知识点: 试题来源: 解析 D 解析:细节理解题。根据第二段的最后一句“He says the technology used...
Soot—also known as black carbon—heats up the atmosphere because it absorbs sunlight. But for years the institutions that focus on climate policy have played down the role of pollutants such as black carbon that stay in the atmosphere for a short time and concentrated on carbon dioxide, whi...
a pigment that absorbs sunlight and stores its energy as glucose. The green color of plants is caused by pigments, such as chlorophyll, reflecting the green light into our eyes, while absorbing the red and blue light. And finally, some light passes completely through leaves, which you’ve...
题目The plant needs sunlight and water to grow. What does a plant do with sunlight? A. absorbs it B. rejects it C. ignores it D. hides from it 相关知识点: 试题来源: 解析 A。植物需要阳光和水生长,植物吸收阳光。B 选项rejects it(拒绝它)不符合;C 选项ignores it(忽略它)不对;D 选项...
It covers our whole body and lets the good things in and the bad things out. It's our first line of protection against the outside environment. Just like our eyes, nose, and ears, it houseone of our five senses. It also absorbs sunlight for vitamin D and heat. Muscles (肌肉) ...
Photovoltaic (PV) solar cells contain a semiconductor wafer, positive on one side and negative on the other, forming an electric field. When light hits the cell, the semiconductor absorbs the sunlight and transfers the energy in the form of electrons. These electrons are captured by the electric...
Solar cells are made of a material called silicon, which absorbs the sunlight’s photons and releases electrons. These electrons form an electrical circuit within the cell, generating direct current (DC) power that is sent to batteries for storage or converted to alternating current (AC) power ...
A. It only reflects sunlight B. It absorbs and re - emits heat radiation from the Earth C. It blocks all heat from the Sun D. It makes the E. arth lose all its heat quickly 相关知识点: 试题来源: 解析 B。解析:大气中的温室气体就像一条毯子。它不是只反射阳光,A选项错误。它主要吸收...
It also absorbs sunlight for vitamin D and heat.Muscles(肌肉)Muscles are how we move and live. All movement in the body is controlled by muscles.Skeletal muscles help us to move around. Smooth muscles control organs within our body. Cardiac muscle is special. It can pump our heart and ...