Making solar panels make senseDanielle Ulman
【答案】C【核心短语/词汇】inthepast 5 years:在过去的5年里【翻译】在过去的5年里,科学家们已经做了许多测试使太阳能电池板更轻。【解析】根据句意,可知此题考查时态和比较级,inthepast 5 years:在过去的5年里,是现在完成时的标志词,因此应用现在完成时,have/has+过去分词,根据选项,A.一般过去时,B.一般...
A 选项 “did” 是一般过去时;C 选项 “have done” 是现在完成时。“in the past 5 years”(在过去的 5 年里)是现在完成时的标志性时间状语,表示从过去持续到现在的一段时间,所以这里要用现在完成时,A 选项不符合,C 选项 “have done” 正确。再看第二空:B 选项 “lighter” 是“light(轻的)” ...
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( )31. Scientists ___ many tests to make solar panels ___ in the past 5years. A. did; light B. did; lighter C. have done; light D. have done; lighter 相关知识点: 试题来源: 解析 【答案】D【核心短语/词汇】light:轻的【翻译】在过去的5年里,科学家们已经做了许多测试,使太阳能电...
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。
Increase the energy efficiency of your home by harnessing the power of the sun with cutting-edge solar panels. Learn More Protect your home and familyfrom power outages and unstable utility grids. Bundle your solar and energy storage at unbeatable prices. ...
Can solar panels save you money? Interested in understanding the impact solar can have on your home? Enter some basic information below, and we’ll instantly provide a free estimate of your energy savings. But this go-around, Trump's main target is China, which leads the world in solar co...