首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
公务员
In fall 2006, the National Basketball Association(NBA)started using basketballs made with synthetic, or man-made, material inste
In fall 2006, the National Basketball Association(NBA)started using basketballs made with synthetic, or man-made, material inste
admin
2016-01-29
30
问题
In fall 2006, the National Basketball Association(NBA)started using basketballs made with synthetic, or man-made, material instead of leather. They made the change because they wanted every basketball they use to feel and bounce the same. Not all leather balls are exactly alike in weight or how they bounce, but the synthetic balls are.
However, some players complained right away that the new balls bounced differently and were actually harder to control than the leather ones.
Physics helped answer questions about why the new balls felt different. For example, the scientists studied friction, which in this case affects the ability of a player to hold onto a ball. " The greater the friction, the better it will stick to his hand," explains a scientist.
Tests on both wet and dry balls showed that while the synthetic ball was easier to hold onto when dry, it had less friction and became much harder to hold onto when wet. That’s because sweat stays on the surface of the synthetic balls but gets taken into the leather balls.
The scientists also tested bounce and found that the logo printed on the new balls made their surface uneven and caused them to bounce a little strangely compared with the leather balls.
In January, the NBA went back to using the leather balls.
They
aren’t perfect, but for now, that’s just the way the ball bounces.
It can be inferred from the text that______.
选项
A、a synthetic ball takes in water faster than a leather ball
B、a leather ball is more difficult to make than a synthetic one
C、a synthetic ball is more expensive than a leather ball
D、a leather ball may increase its weight during a game
答案
D
解析
在第四段第二句话“That’s because sweat stays on the surface of the syntheticballs but gets taken into the leather balls.”这句话中提到:球员在使用由皮革制成的篮球时,手上的汗水会被篮球的表面吸收,即篮球重量会增加,所以选项D表达观点正确。
转载请注明原文地址:https://jikaoti.com/ti/UL64FFFM
本试题收录于:
小学英语题库教师公开招聘分类
0
小学英语
教师公开招聘
相关试题推荐
春之怀古张晓风①春天必然曾经是这样的:从绿意内敛的山头,一把雪再也撑不住了,噗嗤的一声,将冷面笑成花面,一首澌澌然的歌便从云端唱到山麓,从山麓唱到低低的荒村,唱入篱落,
Inthepast,manypeopleusedhorsesfortraveling,farmingandotherkindsofwork.Alotpeoplestillliketoridehorses.And
Areaderwroteintosaythatshewasfeelinglonelyatbreakbecauseherbestfriendwasn’taround.Here’souradvicetoher—an
BEIJING—NOCarDaywasfirststartedby34citiesinFranceonSeptember22,1998.Itwasstartedtoprotecttheenvironment.By
YellowstoneWeatherYellowstoneNationalParkisathighaltitude(海拔).Mostoftheparkisabove7,500feet(2,275meters)
ScientistsassumethatthereisnolifeontheMars.
Whenitcomestofriends,Idesirethosewhowillsharemyhappiness,whopossesswingsoftheirownandwhowillflywithme.I
Mr.Robinsonhadtotravelsomewhereonbusiness,andashewasinahurry,hedecidedtogoby【C1】______.Helikedsitting【C2】_
—Why,Jack,youlooksotired!—Well,I________thehouseandImustfinishtheworktomorrow.
Youcanusethee-mailmikegreen@hotmail.comifyouwantto______.
随机试题
A.前壁B.后壁C.大弯D.小弯E.底胃溃疡多发生于
以下有关处方调配的一般程序的叙述中,不正确的是
位于趾内侧趾甲角旁约0.1寸的腧穴是
某施工单位编制的某工程网络图,如图5-1所示,网络进度计划原始方案各工作的持续时间和估计费用,见表5-3。
美国的甲公司依法在上海设立了A外资企业,主要从事海外代购。现A企业的经营期间即将届满,决定延长经营期限。根据外商投资企业法律制度的规定,下列选项的表述中,正确的有()。
A、 B、 C、 D、 B第一个图形中的小圆圈顺时针移动一格后,减少最后一个,小黑点顺时针方向追加一个,得到下一图形,由此可知答案为B。
用于对下级机关布置工作、阐明王作活动的指导原则的指导性文件,称为()。
某省是我国人口最多的省份之一,每年春节前后,因为放假和过节的关系,给公交运输部门带来了巨大的压力。为此,2006年12月8日,某省物价局主持举行2007年春节期间公交价格听证会。此次听证会严格按照《中华人民共和国价格法》及《政府价格决策听证暂行办法》的有关
安西都护府
小李准备在校园科技周向同学讲解与黑客技术相关的知识,请根据考生文件夹下“Word素材.docx”中的内容,帮助小李完成此项工作。具体要求如下:为文档应用一种合适的主题。
最新回复
(
0
)