首页
登录
职称英语
Our ape-men forefathers had no obvious natural weapons in the struggle for
Our ape-men forefathers had no obvious natural weapons in the struggle for
游客
2023-11-22
34
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【C1】______ of the big cats. They could not【C2】______ with the bear, whose strength, speed and claws【C3】______ an impressive "small-fire" weaponry. They could not even defend themselves【C4】______ running swiftly like the horses, zebras or small animals. If the ape-men had attempted to compete on those terms in the open, they would have been【C5】______ to failure and extinction. But they were【C6】______ with enormous concealed advantages of a kind not possessed by any of their competitors.
In the search 【C7】______ the pickings of the forest, the ape-men had【C8】______ efficient stereoscopic vision and a sense of colour that the animals of the grasslands did not possess. The ability to see clearly at close 【C9】______ permitted the ape-men to study practical problems in a way that lay far【C10】______ the reach 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 to do was climb a tree. Out in the open, however, this simple solution was not【C13】______ Climbing a hill would have helped, but in many places the ground was flat. The ape-men【C14】______ the only possible solution. They reared up as high as possible on their【C15】______ limbs and began to walk upright.
This【C16】______ change of physical position brought about considerable【C17】______ .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 Homo erectus, upright man. [br] 【C13】
选项
A、available
B、enough
C、sufficient
D、convenient
答案
A
解析
available可利用的,可获得的。
转载请注明原文地址:https://tihaiku.com/zcyy/3208474.html
相关试题推荐
Canalsarewatercoursesconstructedtoimproveandextendnaturalwaterways
Canalsarewatercoursesconstructedtoimproveandextendnaturalwaterways
Canalsarewatercoursesconstructedtoimproveandextendnaturalwaterways
Canalsarewatercoursesconstructedtoimproveandextendnaturalwaterways
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Thedifferencebetweenaliquidandagasisobvious【B1】______thecondition
随机试题
[originaltext]TheKennedyCenterpresentsmusic,dance,playsandotherper
HowtoBuildYourVocabularyEffectivelyVocabularyis
[originaltext]W:Whatareyoudoing?M:I’morderingsomefilingcabine
ChineseCalligraphyCalligraphy,thewritingofchar
It’stheholidayseasonandthatmeanskidsbythemillionsareaskingSant
reading讲座中提到了批判素养,并指出“Criticalliteracy,oneapplicationofcriticaltheory,inv
核外某电子的角量子数l=3,它的磁量子数m可能取值有( )。A.1个 B.3
某混凝土试块强度值不满足规范要求,但经法定检测单位对混凝土实体强度经过法定检测后
下列影响房地产供给的因素中,能增加房地产供给量的有( )。A.当前该类房地产价
设备的()是设备更新的估算依据。 A.经济寿命 B.技术寿命
最新回复
(
0
)