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
60
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://www.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
BirdFlu:CommunicatingtheRiskTherecommendationsliste
[originaltext]M:Ihearyouarenotplanningtotransfertoadifferentunivers
Awarmerworldisgoingtobeasickerworldforeverythingfromtreestoma
对于萎缩,下述哪一项是恰当的()A.细胞内线粒体变小,数目不减少 B.
使用股权市价比率模型进行企业价值评估时,通常需要确定一个关键因素,下列说法中
( )体现了投资资金的时间价值。A.内部收益率 B.已分配收益倍数 C.已
并联电容器组外熔断器的额定电流应不小于电容器额定电流的1.43倍选择,并不宜大于
气体物料的输送采用压缩机,下列关于气体输送的说法中,错误的是A.输送液化可燃气体
(2018年真题)某施工合同的约定违反了某行政法规的效力性强制性规定,则该施工合
根据《标准施工招标文件》中通用合同条款的规定,发包人认为有必要时,由监理人通知承
最新回复
(
0
)