G. The birds that migrate south in winter return to different places when weather is warm. 试题答案 在线课程 小题1:D小题2:C小题3:A小题4:F小题5:B 试题分析:文章介绍鸟类迁徙的原因和方式,还有一些鸟不用迁徙,为了让鸟类更好迁徙,有必要保护河口和湿地。小题1:考查句意理解和上下文:根据上文...
解析 Birds **migrated** from north to south last week. 问题是 Birds___(migrate) from north to south last week. 空格处需要根据句意及语法规则填写单词。 句子意思是:鸟类上周从北方迁徙到南方。 last week提示句子应该用一般过去时,migrate的过去式是migrated。反馈...
Migration (迁徙) is common: butterflies fly across the Americas, birds migrate south in winter…but did you know that forests migrate, too? In his new book The Journeys of Trees, science writer Zach St. George explores an extremely slow migration, as forests move inch by inch to more pleas...
For much of the past 2 million years, ancestors of a keen-eyed raptor known as the Swainson's hawk have circled above the vast grasslands of the Western Hemisphere.For the past 15 years, Brian Woodbridge has been studying the hawks and their annual migration to and from South America from...
Birds migrate (迁徙) for several reasons.Many birds cannot live in the cold,so they fly to warmer places in the south.But there are other reasons,too.Birds need to search for food.In winter,many plants die and insects hibernate (冬眠).When it gets colder,birds know it's time to fly ...
Birds migrate(迁徙)for several reasons.Many birds can not live in the cold,so they fly to warmer places in the south.But there are other reasons,too.Birds need to search for food.In winter,many plants die and insects hibernate(冬眠).When it gets colder,birds know it is time to fly to...
根据第一段Migration (迁徙) is common:butterflies fly across the Americas,birds migrate south in winter. . .but did you know that forests migrate,too?(迁徙是很常见的:蝴蝶飞越美洲,鸟类在冬天向南迁徙…但是你知道森林也会迁徙吗?)以及下文跟树木在移动有关。故选B。 短文主要讲述了树木也会迁徙,虽然...
【题文】 Many kinds of birds migrate (迁徙) north in the spring and south in the fall, with most flying at night, looking for food and better conditions. But many birds die along the way. Some of these deaths are the result of human actions, such as hunting, or clearing huge areas ...
Southerly bird populations generally are nonmigratory or make short migrations, whereas more northerly ones travel farther south. The females of some species winter farther south than the males. In many species that reproduce at an age of one year or older, those individuals under the breeding age...
根据第二段的ThestudywaspublishedinEcologyLetters.Itinvolveddataonnearly80,000birdskilledfrom1978to2016inthecityofChicago,Illinois.Researchersmeasuredthesizeof52speciesofthebirds.Mostweredifferentkindsofsongbirds.ThesebirdsreproduceincoldareasofNorthAmericanandspendtheirwintersinareassouthofChicago.(这项研究发表在《...