首页
登录
职称英语
Our ape-men forefathers had no obvious natural weapons in the struggle for s
Our ape-men forefathers had no obvious natural weapons in the struggle for s
游客
2023-08-27
69
管理
问题
Our ape-men forefathers had no obvious natural weapons in the struggle for survival in the open. They had neither the powerful teeth nor the strong claws of the big cats. They could not【C1】______with the bear, whose strength, speed and claws【C2】______an impressive " small fire" weaponry. They could not even【C3】______themselves by running swiftly like the horses, zebras(斑马)or small animals. If the ape-men had【C4】______to compete on those terms in the open, they would have been【C5】______to failure and extinction. But they were【C6】______with a great deal of【C7】______advantages of a kind not possessed by any of their competitors. In the search【C8】______the pickings of the forest, the ape-men had【C9】______efficient stereoscopic(立体感的)vision and a sense of color that the animals of the grasslands did not possess. The ability to see clearly at close range permitted the ape-men to study practical problems in a way that lay far【C10】______the reaches of the original inhabitants of the grassland. Good long-distance sight was【C11】______another matter.
Lack of long-distance vision had not been a problem for forest-dwelling apes and monkeys because the higher the viewpoint, the greater the range of sight—so【C12】______they had had to do was climb a tree. Out in the open, however, this simple solution was not【C13】______. Climbing a hill would have helped, but the ground was【C14】______in many places. The ape-men【C15】______the only possible solution. They【C16】______up as high as possible on their hind limbs and began to walk upright.
This vital change of【C17】______position brought about considerable disadvantages. It was extremely unstable and it meant that the already slow ape-men became slower still.【C18】______, they persevered and their bone structure gradually became【C19】______to the new, unstable position that【C20】______them the name of upright man. [br] 【C18】
选项
A、However
B、Therefore
C、Meanwhile
D、Subsequently
答案
A
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2961969.html
相关试题推荐
Thatexperiencesinfluencesubsequentbehaviorisevidenceofanobviousbu
Thatexperiencesinfluencesubsequentbehaviorisevidenceofanobviousbu
NaturalgasVehiclesKermittheFrogonces
NaturalgasVehiclesKermittheFrogonces
NaturalgasVehiclesKermittheFrogonces
NaturalgasVehiclesKermittheFrogonces
NaturalgasVehiclesKermittheFrogonces
NaturalgasVehiclesKermittheFrogonces
Market【C1】______donotcomenaturallytoChineseofficials.Forthepastfo
Market【C1】______donotcomenaturallytoChineseofficials.Forthepastfo
随机试题
[img]2016m1x/ct_etoeiclm_etoeiclzp_0001_20161026[/img][br][originaltext](A)Th
Justover10yearsago,IngmarBergmanannouncedthatthewidelyacclaimed
[originaltext]Today,airtravelismuchsatyrthandrivingacaronabusy
设f(x)是可导函数,Δx是自变量在点x处的增量,则( )。A.2f′(x)f
( )是风险分析和管理中的一项基础性工作。A、风险评估 B、风险识别
阅读下面材料,根据要求作文。 有三个这样的孩子:一个孩子4岁才会说话,7岁才
新古典经济学以市场为导向的主张在西方环境政策的形成中起到了重要作用,但其研究方法
配电柜应装设的配备器具有()。A.电源隔离开关 B.静电保护器 C.电
主要通过性接触传播的传染病是 A.甲型病毒性肝炎 B.艾滋病 C.流行性乙
应付账款和预付账款一样都是负债类科目。()
最新回复
(
0
)