首页
登录
职称英语
Crows are probably the most frequently met and easily identifiable members o
Crows are probably the most frequently met and easily identifiable members o
游客
2023-08-30
47
管理
问题
Crows are probably the most frequently met and easily identifiable members of the native fauna of the United States. The great number of tales, legends, and myths about these birds indicates that people have been exceptionally interested in them for a long time. On the other hand, when it comes to substantive — particularly behavioral — information, crows are less well known than many comparably common species and, for that matter, not a few quite uncommon ones: the endangered California condor, to cite one obvious example. There are practical reasons for this.
Crows are notoriously poor and aggravating subjects for field research. Keen observers and quick learners, they are astute about the intentions of other creatures, including researchers, and adept at avoiding them. Because they are so numerous, active, and monochromatic, it is difficult to distinguish one crow from another. Bands, radio transmitters, or other identifying devices can be attached to them, but this of course requires catching live crows, which are among the wariest and most untrappable of birds.
Technical difficulties aside, crow research is daunting because the ways of these birds are so complex and various. As preeminent generalists, members of this species ingeniously exploit a great range of habitats and resources, and they’ can quickly adjust to changes in their circumstances. Being so educable, individual birds have markedly different interests and inclinations, strategies and seams. For example, one pet crow learned how to let a dog out of its kennel by pulling the pin on the door. When the dog escaped, the bird went into the kennel and ate its food. [br] According to the second paragraph, crows are poor subjects for field research for all the following reasons EXCEPT ______.
选项
A、they can successfully avoid observers
B、they are hard to distinguish from one another
C、they can be quite aggressive
D、they are difficult to catch
答案
C
解析
细节定位题。 根据第2段的内容运用排除法,A项:它们能成功地逃避观察;B项:很难辨认它们的不同,C项;它们很好斗,D项;它们很难抓。其中选项A,B,D都有提到,唯独选项C没有提到,故C项正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2970814.html
相关试题推荐
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
Probablyatnotimeinhislifeistheaverageindividualmorelikelytobe
随机试题
Ahistoricalstudyoflanguageisa______studyoflanguage.A、synchronicB、diac
[originaltext]W:Goodmorning,John,nicetobehere!M:Youknow,well,alot
Whatdoesthemanadmireabouthisneighbor?[br][originaltext]M:I’vegotto
心肌梗死后室壁瘤常发生在A.室间隔 B.左房 C.右室 D.心尖部 E.
项目成本计划的编制方法中,当项目非常庞大和复杂而需要分为几个部分时,可采用(
以下关于洞固位形的说法,错误的是A.其固位力主要取决于洞的深度和形状 B.洞深
“十三五”时期,要实施旅游服务质量提升计划,加快建立以()评价为主的旅游目的地评
骨盆最小平面的范围,前面是耻骨联合下缘,两侧为坐骨棘,后面是A、第4~5骶椎间
下列情形中,利用摄影测量制作大比例尺数字线划图时,应进行野外补测的有()。A.
按照价格上升的速度,下列不属于通货膨胀类型的是( )。A.温和的通货膨胀 B.
最新回复
(
0
)