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
51
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
EachUSDAbeefgradeisameasureofadistinctlevelofquality.Becausebe
建筑围护结构热惰性指标的有关参数是()。A.各构造层材料的导热系数 B.各
下列不是精液检查目的的是A、法医学鉴定B、不孕症研究C、睾丸癌D、人工授精
A.大黄素 B.大黄素蒽酮 C.紫草素 D.番泻苷A E.丹参醌I不稳定
2013年二季度,我国税收月收入同比增速逐步提高,分别为7.9%,8.3%和12
自然人申请证券账户,需提交没有证券余额的证券账户卡。()正确错误
证券公司从事期货中间介绍业务的工作人员不得买卖()。A.金融期货合约 B.商
()是评价中心运用得最广泛,而且被认为是最有效的一种评估形式。A.无领导小组讨
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)