根据第一段中的Passengerpigeons (旅鸽) werethemostcommonbirdsinallofNorthAmericainthe 1800s.It wascommontoseelargegroupsofpassengerpigeons - - groupsthatmade a soundlike a storm.(旅鸽是19世纪整个北美最常见的鸟类,常见的是成群的客鸽,它们发出的声音像暴风雨。)可知,19世纪时的旅鸽数目众多。故选A。
根据第一段中的“Passenger pigeons (旅鸽) were the most common birds in all of North America in the 1800s. It was common to see large groups of passenger pigeons — groups that made a sound like a storm. (旅鸽是19世纪北美最常见的鸟类。成群结队的旅鸽发出暴风雨般的声音是很常见的。)”...
Risk, Mercury Levels, and Birds: Relating Adverse Laboratory Effects to Field Biomonitoring There is an abundance of field data on levels of mercury in a variety of organisms and there are a number of studies that demonstrate the adverse effects o... BM Gochfeld - 《Environmental Research》 被...
Define Common Tern. Common Tern synonyms, Common Tern pronunciation, Common Tern translation, English dictionary definition of Common Tern. n. Any of various terns, especially Sterna hirundo, which breeds in Arctic and subarctic regions. American Heritag
In autumn, common pheasants form flocks in which they will live until the following spring. These birds are most comfortable on the ground, where they forage for grains, seeds, berries, insects, and, occasionally, small animals. They can fly and launch themselves airborne with an abrupt, noisy...
根据第一段中的Pa ssenger pigeons were the most common birds i n all of North America in the 1800s. It wa s common to see large groups of passenger pi geons - group that made a sound like a stor m.(旅鸽是19世纪北美最常见的鸟类。 经常能看 到一大群候鸽,它们发出暴风雨般的叫声。 )...
根据第一段中的“Passenger pigeons(旅鸽) were the most common birds in all of North Ameri-ca in the 1800s. It was common to see large groups of pas-senger pigeons - groups that made a sound like a storm.可知,19世纪时的旅鸽数目众多。2.选C 细节理解题。根据第二段中的“The process of...
Birds were either fedad libitumor food deprived for 16h before behavioral testing. N/GRP refers to the number of birds in each experimental group. ∗∗∗ Denotes a significant difference with the vehicle-treated group. Reprinted fromBuntin et al. (1991)with permission. ...
Two tongue-in-beak field guides mimic the real thing with exquisite mock seriousness. The first, Another Field Guide to Little Known and Seldom Seen Birds of North America, is divided into three parts. The opening section provides the novice birder wit...
August 27, 2024 6:30 AM Read Next North Carolina A common yard shrub kills hundreds of NC birds each winter. Evan Moore, Charlotte Observer, 31 Jan. 2025 Noun Students use simulation software to model systems such as disease epidemics, the viral spread of ideas, the tragedy of the ...