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
2024-02-17
72
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/3457548.html
相关试题推荐
[originaltext]Manyofusoftencomplainthatwecannotrememberthingsore
[originaltext]Manyofusoftencomplainthatwecannotrememberthingsore
[originaltext]Duringthe19thcentury,women’seducationwasnotconsidered
[originaltext]W:Youdon’tlooktoowell.Maybeyoushouldtakethedayofffro
[originaltext]M:Excuseme!I’dliketoseeMr.Jonesthisafternoon,please.
[originaltext]M:Excuseme!I’dliketoseeMr.Jonesthisafternoon,please.
[originaltext]M:Excuseme!I’dliketoseeMr.Jonesthisafternoon,please.
[originaltext]M:Excuseme!I’dliketoseeMr.Jonesthisafternoon,please.
[originaltext]M:Excuseme!I’dliketoseeMr.Jonesthisafternoon,please.
[originaltext]OnJune17,1744,theofficialsfromMarylandandVirginiahel
随机试题
IWanttohavesome______,please.A、potatosB、tomatoC、orangesCsome后应跟可数名词的复数形
Weregretbeingunabletoentertainyourrequestforprovidingfreeboardingto
[originaltext]W:IwanttobuyboththeskirtandtheT-shirt.Howmucharethey
[originaltext]Museumshavechanged.Theyarenolongerplacesthatone"sho
如果质子不经过FoF1-ATP酶回到线粒体基质,则会发生( )。A.还原 B
基辅罗斯早期实行的税收政策称()A.相地而衰征 B.什一税 C.索贡巡行
商业银行对银行账簿利率风险管理应包括利率风险的()等全过程。A.识别 B.感知
氨苄西林和阿莫西林的比较,描述正确的是A:氨苄西林的抗菌谱较窄 B:稳定性有明
(2017年11月)PRI是根据()归纳提练而成的指标A.战略目标
甲死后留有房屋1套、存款3万元和古画1幅。甲生前立有遗嘱,将房屋分给儿子乙,存款
最新回复
(
0
)