Over the past half century,___(use) chemical fertilizers___(become) very common in farming. 解析:第一空考查动名词作主语;第二空考查主谓一致和时态,动名词作主语时谓语用单数,根据“over the past half century”可知用现在完成时态。 相关知识点: 试题来源: 解析 using has become 解析:第一空考查...
通读全文,根据第一段“Over the past half-century, scientists have settled on two reasonable theories related to baby talk. One states that a young child’s brain needs time to master language. The second theory states that a child’s vocabulary level is the key factor.”( 在过去的半个世纪...
the Year,thatover the past half centuryhuman activity has caused an unprecedented decline in biological diversity. daccess-ods.un.org daccess-ods.un.org 秘书 长在今年早些时候的一封信中指出,在过去半世纪中,人类活动造成生物多样性以空前速度衰减。
【题目】Over the past half century, ___ chemical fertilizers has become very common in farming. A. having usedB. useC. used D. using试题答案 在线课程 【答案】D 【解析】 试题分析:句意:在过去的半个世纪,在农业中使用化肥已经很普遍。此处是作主语,故用动词-ing形式,故选D。练习册系列...
12.Over the past half century,using chemical fertilizers have become very common in farming.have→has. 试题答案 在线课程 分析在过去的半个世纪,在农业上使用化学肥料已经很普遍了. 解答答案:have→has 根据句意,主语为"using chemical fertilizers"这是一个动名词做主语,谓语需用单数,即has. ...
Over the past half century, using chemical fertilizers has become(become) very common in farming. 相关知识点: 试题来源: 解析 答案:has become.考查单词填空.根据句意和汉语提示可知这里使用动名词作主语,谓语用三单,时间是Over the past half century,和现在完成时搭配. 在过去的半个世纪里,使用化肥在...
Over the past half-century, North America has lost more than a quarter of its entire bird population, or around 3 billion birds. "We saw this great net loss across the entire bird community," says Ken Rosenberg, a scientist in Ithaca, N.Y. "But we also knew that other bird populations...
答案解析 查看更多优质解析 解答一 举报 这里的over是介词 介词不能单独存在 故over不能单独 作句子成分 Over the past half century是一个介词短语 如果在句首 一般是作状语的 解析看不懂?免费查看同类题视频解析查看解答 相似问题 over the past century 请问下英语中over the past 50 years这个短语对不对 ...
19.Over the past half century,usingchemical (化学) fertilizers has become very common in farming. 试题答案 在线课程 分析在过去的半个世纪里,使用化肥已经成为农耕非常普遍的事情了. 解答答案:chemical. 本空修饰后面的名词fertilizers,可知前面使用形容词chemical来修饰;故答案为chemical. ...
Over the past half century,using chemical fertilizers have become very common in farming.___. 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析解答一 举报答案:have→has根据句意,主语为"using chemical fertilizers"这是一个动名词做主语,谓语需用单数,即has....