句子主语“The sun”为第三人称单数,需根据语境判断正确时态。 1. **选项A(produces)**:一般现在时,描述客观事实或普遍真理。太阳产生光和热是自然规律,需用一般现在时,且主语是单数,动词需加“s”,符合语法和逻辑。 2. **选项B(produced)**:过去时,表示过去发生的动作,但太阳持续发光发热是客观现实,与...
Heat and light from the Sun are produced through a process called nuclear fusion.Sunlight is an excellent energy source and the future of using solar power is very exciting. The Sun's energy can be used to heat and cool buildings, make electricity, operate communication and navigation systems ...
gnd用鼠”WhenNylon-6isburnedtilproducespoisonouspolluiani^suchasniirogiciioxides.AlthoughotherlabshaveexploredcatalyststodegradeNylon-6♦thosecatalystsrequireextremeconditions（suchastemperaturesashighas350degreesCelsius）♦high-pressureMcam（whichisenergeticallyexpensiveandinefficient）and/ortoxic?
China produces roughly 95% of the global supply as of 2024, according to data from the US Geological Survey. This dominant position means companies there can flood the market with cheap metal, making it difficult for others to compete. “The economics of all this is uncertain,” Jowitt says...
The roads were narrow and there weren't many ring roads. Big families were crowded into small houses. Many families couldn't get enough food. Few children had the chance to receive a good education. People had little money to see a doctor. ...
4. When the sun is shining on the ground, it produces heat energy, and ___, we can feel warm.相关知识点: 试题来源: 解析 thus 该题考察连词的使用,需要填入一个表示结果的连词来连接前后两句。由于前半句“当太阳照耀地面时,它产生热能”是后半句“我们可以感到温暖”的原因,因此需要填入表示结果的...
4.The sun we get heat and light is the most important source of energy.( )A.whichB.thatC.from whichD.from it
He also does a typical Sunday roast. We all love roast beef and vegetables, but Mum says we’d better not eat too much roast food as it may make us suffer from heat inside our bodies, according to traditional Chi...
Unlike solar panels, CSP concentrates the sun's rayson boilers by using10. The resulting heatproduces high-temperature11, which inturn moves the turbines which generate electricity. CSP plants will be situated in12to allowsea water to run in. ...
But it’s a real marvel: The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. It can also cause cell death and make us blind. It could fit 1.3 million Earths inside its sphere [source: SpaceDaily]. It produces poem-worthy ...