首页
登录
职称英语
[originaltext] Bows and arrows are one of man’s oldest weapons. They gave ea
[originaltext] Bows and arrows are one of man’s oldest weapons. They gave ea
游客
2024-02-19
59
管理
问题
Bows and arrows are one of man’s oldest weapons. They gave early man an effective weapon to kill his enemies. The ordinary bow or short bow was used by nearly all early people. This bow had limited power and short range. However, man overcame these faults by learning to track his targets at a close range. The long bow was most likely discovered when someone found out that a five-foot piece of wood made a better bow than a three-foot piece. Hundreds of thousands of these bows were made and used for three hundred years. However, not one is known to survive today. We believe that a force of about one hundred pounds was needed to pull the string all the way back on a long bow. For a long time the bow was just a bent stick and string. In fact, more changes have taken place in a bow in the past 25 years than in the last 7 centuries. Today, bow is forceful. It is as exact as a gun. In addition, it requires little strength to draw the string. Modem bows also have precise aiming devices. In indoor contests, perfect scores from 40 yards are common. The invention of the bows itself ranks with discovery of fire and the wheel. It was a great step forward for man.
选项
A、Because it did not shoot far.
B、Because it did not bend easily.
C、Because it was too heavy.
D、Because its string was short.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3463437.html
相关试题推荐
[originaltext]Somepeoplearguethatthepressureoninternationalsportsme
[originaltext]TheWorldHealthOrganizationhasreleasedareportaboutho
[originaltext]TheWorldHealthOrganizationhasreleasedareportaboutho
[originaltext]W:Dr.Smith.IneedtoaskyouaboutsomethinginChapter12.We
[originaltext]W:Dr.Smith.IneedtoaskyouaboutsomethinginChapter12.We
[originaltext]W:Dr.Smith.IneedtoaskyouaboutsomethinginChapter12.We
[originaltext]M:Hello!W:Hello.ThisisLilyWilson,MayIspeaktoTedRobi
[originaltext]M:Hello!W:Hello.ThisisLilyWilson,MayIspeaktoTedRobi
[originaltext]M:Mymanagersaidwe’regoingtohavesomelay-offssoon.W:Wil
[originaltext]M:Mymanagersaidwe’regoingtohavesomelay-offssoon.W:Wil
随机试题
[originaltext]Wecanagreewithprimitivemanthatfoodisabasicneed,b
[originaltext]M:IjustcamebackfromatriptoChinaandIwasveryimpressed
Scientistshavedevelopedanewcancerdrug.Sofar,theyhavetasteditonl
[originaltext]M:Youhaven’tpassedtheEnglishexamination,haveyou?W:No,how
[originaltext](16)TheUShousingsectorusuallyleadstherestoftheecon
PabloRuizPicassowasaSpanishpainter,【B1】______andengraverwholivedfr
建筑内部装修材料中,纸面石膏板板材的燃烧性能是以下哪种级别?( )A.B1
下列关于应税污染物计税依据的说法,错误的是()。A、应税大气污染物按照污染物排
砂浆分层度试验的目的是检验砂浆的流动性。
支承屋面梁的柱牛腿,如图所示,宽度b=400mm,屋架在牛腿上的支承长度为200
最新回复
(
0
)