解析 科学家们在过去五年里做了很多实验,目的是让太阳能电池板更轻。所以正确答案是D。 1. 句子中“in the past 5 years”表示时间“在过去的五年里”,句子应该用现在完成时,故排除A、B选项。 2. 根据句意,科学家做实验的目的是为了让太阳能板更轻,应用比较级,故排除C选项。
解析 科学家在过去5年中做了很多测试,使太阳能电池板变得更轻。故答案选D。 1. 题干中“in the past 5 years”是现在完成时的标志性时间状语,所以第一个空应该用现在完成时态have done。 2. make+宾语+形容词,意为“使……变得……”,所以第二个空应该用形容词lighter,表示“更轻”。
Scientists have done many tests to make solar panels lighter in the past 5 years. 1. **句子结构**: 这是一个简单句,主语是Scientists,谓语动词需要根据句意和时态来填写。 2. **时态**: in the past 5 years 提示句子使用现在完成时,结构为have/has done。 3. **句意**: 科学家们在过去5年中...
“What President Biden wants to do is make sure that those folks have better choices, that they have alternatives, that they can be the people who go to work to make the solar panels,” Kerry said. Advertisement - story continues below “They were making them here at home. That is going...
根据 In many parts of the world,solar energy is now the cheapest form of electricity.可知在世界许多地方,太阳能现在是最便宜的电力形式。故选C.(2)C.细节理解题。根据However,solar panels also have their problems.They stop working at night and on rainy days.可知然而,太阳能...
MIT Researchers Find a Way To Make Solar Panels from GrassAn MIT researcher named Andrea Mershin says that creating solar energy could be as simple as mixing a bag of grass clippings with some custom chemicals and painting them on a roof.Mark Boyer...
Have you ever seen a solar panel (太阳能电池板) in your neighborhood? Solar panels take energy from the sun and turn it into electricity. Over the past ten years, the price of solar panels has gone down greatly. In many parts of the world, solar energy is now the c...
He adds that building components, such as green roofs and solar panels, have become trendy that sometimes they no longer make sense for a project. He... L Hosey - 《Architect》 被引量: 4发表: 2007年 Stanford scientists calculate the energy required to store wind and solar power on the ...
The question asks for the ideal location for floating solar panels to be most helpful. Let's analyze the options: * **A. In small cities with more rain and less sunshine.** Solar panels need ample sunshine to generate electricity effectively. More rain and less sunshine would make them les...
For Ira and many others, solar panels turn homes into their own power generators. During some times of the day, the panels produce enough excess power that it’s fed back to the grid. Watch power from Ira’s solar panels flow to his home and out to the grid. Credit: Ira Flatow ...