首页
登录
职称英语
For some birds the sense of smell appears to play a role in navigation, since pi
For some birds the sense of smell appears to play a role in navigation, since pi
游客
2024-01-13
94
管理
问题
For some birds the sense of smell appears to play a role in navigation, since pigeons with surgically removed olfactory nerves
were found to have increased difficulties
in homing.
选项
A、were found to have increased difficulties
B、have been found to have increased difficulty
C、were found to have increasing difficulty
D、had been found to have increased difficulties
E、have been found to have increasing difficulties
答案
B
解析
A、C、D中过去时或过去完成时与主句的一般现在时态是不对应的。句子的前后是因果关系(由since引导的原因从句),但当把过去时或过去完成时代入句中,就会发现前后的因果关系很模糊,甚至不存在。Why?因为过去的时态仅表明过去此发现是客观的,并不表明这种发现至今仍客观存在。因此主句所下的论断appears to play a role in navigation就是缺乏事实根据的。B、E中用现在完成时使得前后时态一致,逻辑关系准确。而此处,difficulties的增加是由于被去掉嗅觉系统后造成的,因而increase是被动动作,而非主动动作,所以选B。还记得我们在第一章第一个例子时说的:在选择用increased还是increasing作限定词,必定是increased正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3358301.html
相关试题推荐
Mechanicorp’snewestproductcostssolittletomakethatitappearsdoubtfult
Forsomebirdsthesenseofsmellappearstoplayaroleinnavigation,sincepi
ItappearsillogicaltosomepeoplethatWestGermany,whichbanssuchseemingl
TheEmperorAugustus,itappears,commissionedanidealizedsculpturedportrait,
Itappearsthatimprovingwomen’sopportunitiesinsciencehasbenefitedbothth
Residentsoftheisolatedislandwereforcedtomastertheartofnavigation,be
Thetechnicalknow-how,ifnotthepolitical(i)______,appearsalreadyathand
Inthemachinelikeworldofclassicalphysics,thehumanintellectappears(i)__
Whenselectinganest,thefemaleoftheriverblenny(asmallfish)appears
Whenselectinganest,thefemaleoftheriverblenny(asmallfish)appears
随机试题
Ourlivesarewoventogether.AsmuchasIenjoymyown【C1】______Inolonger
GratefulPeopleAreHappierandHealthierA)Itturnsouttha
甲对租赁房屋的占有属于( )A.有权占有 B.无权占有 C.间接占
A.2 B.3 C.0 D.不存在
雇佣工人在剩余劳动时间创造的是()A.商品的使用价值 B.商品的价值
A.大细胞均一性B.正常体积均一性C.小细胞均一性D.小细胞非均一性E.大细胞非
急性腹膜炎的主要体征是A:腹部压痛 B:肠鸣音亢进 C:腹膜刺激征 D:移
根据企业国有资产法律制度的规定,国有独资公司发生的下列事项中,除其他法律、行政法
某施工现场发生安全生产事故,造成6人死亡,直接经济损失6000万元人民币。根据《
施工中,用井筒中的吊盘进行()的行为是错误的。A.浇筑井壁的准备工作 B.张紧
最新回复
(
0
)