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
What can dogs see? The answer to this question is disappointing; dogs【C1】______see no colors. The answer is disappointing【C2】___
What can dogs see? The answer to this question is disappointing; dogs【C1】______see no colors. The answer is disappointing【C2】___
admin
2010-07-24
42
问题
What can dogs see? The answer to this question is disappointing; dogs【C1】______see no colors. The answer is disappointing【C2】______many owners of dogs will naturally be sorry that their dogs cannot see colors which to them are beautiful. But then, they may【C3】______that clogs have an extraordinary【C4】______sense of smell. The dog’s world is【C5】______in enjoyable smells,【C6】______it may be colorless.
How do we know if dogs are color-blind? This has been tested in the same way【C7】______it has been discovered what dogs can hear. The【C8】______has been made to train dogs to salivate(流口水)when they are shown【C9】______different colors. Such experiments have【C10】______failures; it has been found impossible to make dogs【C11】______colors from one another【C12】______signals for their dinner. This question requires further【C13】______with other techniques, but so far as the available scientific evidence【C14】______, dogs seem to be color-blind.
Monkeys, on the other hand, are able to distinguish colors. They have been trained successfully to【C15】______their meal to a cupboard, the door of【C16】______was painted in a certain color, and to【C17】______other available cupboards with differently colored doors,【C18】______which there was no food.【C19】______monkeys and apes,【C20】______, most mammals seem to be color-blind. Even bulls have been shown not to see red as a color.
【C2】
选项
A、even if
B、while
C、due to
D、because
答案
D
解析
逻辑关系。显然,从句的内容是让人失望的原因,所以because符合句意和逻辑,故选D。
转载请注明原文地址:https://kaotiyun.com/show/hyN7777K
0
大学英语四级
相关试题推荐
Withunemploymentrisingandhousingcostsstillhigh,citiesaroundthecountryareexperiencinganewandsuddenwaveofhomel
A、Slimwomenusuallyfidgetlessthanfatwomen.B、Menusuallyfidgetmorefrequentlythanwomen.C、Fidgetinghelpspeopleexpen
Isthecustomeralwaysright?Theanswer,itseems,dependsonwhichcountryyouarein.Shoppingisverymuchapartofacount
A、Morejobscouldbeprovidedthanbefore.B、Morepeoplecouldbeeducatedthanbefore.C、Morebookscouldbeprintedanddistri
SinceWordWarⅡ,therehasbeenaclearlynoticeabletrend,especiallyamongthegrowinggroupofcollegestudents,towardearl
Thereisnoquestionthatsome"greenwashing"isgoingoninthecorporateworld.Byernwerk,aBavarianutility,beganselling"
A、Peoplewholinktothewebsitecanaskandanswerquestionsconcerned.B、Peoplewholinktothewebsitecanshareexperience
A、Helikesbiologyenoughtocontinuewithit.B、Hisgradesinsciencecoursesareverygood.C、Hehasn’ttakenenoughcoursesi
Isthegoaltomakeallofourpaperfromwaste?It’sa【S1】______question.Ifwecollectenoughwaste,couldcompaniesstopusin
随机试题
用于表示“锅炉水”的英文单词是()。
A.血清脂肪酶B.血尿素氮C.血清淀粉酶D.血清正铁白蛋白E.血清钙在急性水肿型胰腺炎时为阴性,在出血坏死型胰腺炎时为阳性的是
A、个人简化口腔卫生指数B、牙龈指数C、菌斑指数D、龈沟出血指数E、社区牙周指数评价牙龈炎的活动状况
统计工作的基本步骤中包括()。
三角测量的网(锁)布设,应符合的要求中,加密的控制网,可采用()等形式。
液压千斤顶
贷款发放后,不随基准利率的调整而调整。()
H公司与F公司签订售后回购协议,于2002年1月1日将一台账面价值为80万元的设备出售给F公司,售价为100万元,再以经营租赁方式从F公司租回,租期为4年,另附免租期1年,H公司同时代垫相关费用5万元,租赁合同规定:第1年至第4年的租金分别为25万元、35
中小学身体训练过程中.在一定范围内施加给运动员有机体的运动负荷(),其消耗过程就越剧烈,超量恢复程度就()。
浅海处,一眼可见密密层层色彩斑斓的珊瑚礁,还有比珊瑚更___________的鱼群游弋其间。海底也有峡谷,只见珊瑚礁猛地___________于海底悬崖之下,当然也滑出了我们的视线。填入画横线部分最恰当的一项是()。
最新回复
(
0
)