首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these
Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these
admin
2014-09-29
63
问题
Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these species interact while remaining separate, each occupying its own elevational zone. The sagebrush chipmunk is found at the lowest elevation, among the sagebrush. The yellow pine chipmunk is common in low to mid-elevations and open conifer forests, including pihon and ponderosa and Jeffrey pine forests. The lodgepole chipmunk is found at higher elevations, among the lodgepoles, firs, and high-elevation pines. The alpine chipmunk is higher still, venturing among the talus slopes, alpine meadows, and high-elevation pines and junipers.
Obviously, the ranges of each species overlap.
Why don’t sagebrush chipmunks move into the pine zones?
Why don’t alpine chipmunks move to lower elevations and share the conifer forests with lodgepole chipmunks?
Look at the four squares[
]that indicate where the following sentence can be added to the passage.
Yet each species remains within a fairly well-defined elevational zone.
Where would the sentence best fit?
选项
A、Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these species interact while remaining separate, each occupying its own elevational zone. The sagebrush chipmunk is found at the lowest elevation, among the sagebrush. The yellow pine chipmunk is common in low to mid-elevations and open conifer forests, including pihon and ponderosa and Jeffrey pine forests. The lodgepole chipmunk is found at higher elevations, among the lodgepoles, firs, and high-elevation pines. The alpine chipmunk is higher still, venturing among the talus slopes, alpine meadows, and high-elevation pines and junipers. Yet each species remains within a fairly well-defined elevational zone. Obviously, the ranges of each species overlap.
Why don’t sagebrush chipmunks move into the pine zones?
Why don’t alpine chipmunks move to lower elevations and share the conifer forests with lodgepole chipmunks?
B、Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these species interact while remaining separate, each occupying its own elevational zone. The sagebrush chipmunk is found at the lowest elevation, among the sagebrush. The yellow pine chipmunk is common in low to mid-elevations and open conifer forests, including pihon and ponderosa and Jeffrey pine forests. The lodgepole chipmunk is found at higher elevations, among the lodgepoles, firs, and high-elevation pines. The alpine chipmunk is higher still, venturing among the talus slopes, alpine meadows, and high-elevation pines and junipers.
Obviously, the ranges of each species overlap. Yet each species remains within a fairly well-defined elevational zone. Why don’t sagebrush chipmunks move into the pine zones?
Why don’t alpine chipmunks move to lower elevations and share the conifer forests with lodgepole chipmunks?
C、Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these species interact while remaining separate, each occupying its own elevational zone. The sagebrush chipmunk is found at the lowest elevation, among the sagebrush. The yellow pine chipmunk is common in low to mid-elevations and open conifer forests, including pihon and ponderosa and Jeffrey pine forests. The lodgepole chipmunk is found at higher elevations, among the lodgepoles, firs, and high-elevation pines. The alpine chipmunk is higher still, venturing among the talus slopes, alpine meadows, and high-elevation pines and junipers.
Obviously, the ranges of each species overlap.
Why don’t sagebrush chipmunks move into the pine zones? Yet each species remains within a fairly well-defined elevational zone. Why don’t alpine chipmunks move to lower elevations and share the conifer forests with lodgepole chipmunks?
D、Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these species interact while remaining separate, each occupying its own elevational zone. The sagebrush chipmunk is found at the lowest elevation, among the sagebrush. The yellow pine chipmunk is common in low to mid-elevations and open conifer forests, including pinon and ponderosa and Jeffrey pine forests. The lodgepole chipmunk is found at higher elevations, among the lodgepoles, firs, and high-elevation pines. The alpine chipmunk is higher still, venturing among the talus slopes, alpine meadows, and high-elevation pines and junipers.
Obviously, the ranges of each species overlap.
Why don’t sagebrush chipmunks move into the pine zones?
Why don’t alpine chipmunks move to lower elevations and share the conifer forests with lodgepole chipmunks? Yet each species remains within a fairly well-defined elevational zone.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/6UfO777K
0
托福(TOEFL)
相关试题推荐
Completetheformbelow.WriteNOMORETHANTHREEWORDSAND/ORNUMBERSforeachanswer.AccommodationReques
Whatproblemsdothespeakersidentifyforeachexperiment?ChooseyouranswersfromtheboxandwritethelettersA-Hnexttoq
Completethenotesbelow.WriteNOMORETHANTWOWORDSforeachanswer.MassStrandingsofWhalesandDolphi
Completethetablebelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeachanswer.USARESEARCHPROJECTSINTOCLASSSIZES
Whatfeaturedothespeakersidentifyforeachofthefollowingcourses?ChooseFIVEanswersfromtheboxandwritethecorrect
Completethenotesbelow.WriteONEWORDONLYforeachanswer.ChimpanzeeBehavioursSpeciesWecanfindPanorPanTroglody
Choosethecorrectletter,A,BorC.Whatkindofresearchmethoddoestheprofessorrecommend?
Completethesentencesbelow.WriteONEWORDAND/ORANUMBERforeachanswer.Theuniversity’sownGeologyDepartmenthasalso
ResearchingtheoriginofmedievalmanuscriptsBackgroundMedievalmanuscripts—handwrittenbooksproducedbetweenthefifth
Itisestimatedthatover99percentofallspeciesthateverexistedhavebecome extinct.Whatcausesextinction?
随机试题
监管部门是市场约束的核心,以下不是监管部门作用的是()。
Thepicture__________meofthedayswhenIspentmychildhoodinthecountryside.
A.中性粒细胞B.嗜酸性粒细胞C.嗜碱性粒细胞D.淋巴细胞E.单核细胞细胞核形常为不规则形、肾形、马蹄形,或扭曲折叠的是
恢复期血清病毒中和抗体滴度较急性期升高4倍以上,见于
A.外阴炎B.滴虫性阴道炎C.念珠菌性阴道炎D.前庭大腺炎E.慢性宫颈炎
中国首次引入DRB是()项目,随后一大批世行贷款项目也开始采用DRB方式。
记账本位币,是指企业经营所处的主要经济环境中的货币。()
广西境内的国家历史文化名城包括()。
教师中心论代表人物是()。
Theoldprofessorwon’tbepresentatthecelebrationparty.
最新回复
(
0
)