首页
登录
职称英语
When was the paintbrush first utilized? [br] [originaltext] An ancient pain
When was the paintbrush first utilized? [br] [originaltext] An ancient pain
游客
2024-10-22
46
管理
问题
When was the paintbrush first utilized? [br]
An ancient paintbrush used by a prehistoric cave artist survives from 30, 000 years ago. But the bristles of the new nanobrushes are made of tiny carbon filaments—thirty billionths of a meter across and a few millionths long. The brush handles they’re attached to are comparatively large—thicker than a human hair! The researchers have taken microscope pictures showing the brushes can be used to sweep up tiny pieces of nanodust on dirty surfaces.
The researchers also used their brushes to paint microstructures; and by coating the hairs with absorbent compounds, they could soak poisonous substances from water. If the tiny tools prove robust enough, they could one day find medical uses, or sweeping away unwanted dirt.
选项
A、sweep up tiny pieces of nanodust
B、paint microstructures
C、soak toxins from water
D、find medical uses
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3811691.html
相关试题推荐
______politicianswerekilledintheterroristattack.[br][originaltext]
______politicianswerekilledintheterroristattack.[originaltext]Armen
TheWHOsaysmillionsofpeopleareatrisk______.[br][originaltext]The
TheWHOsaysmillionsofpeopleareatrisk______.[originaltext]TheWorld
Accordingtothenews,Israeliairstrikes______.[originaltext]Israellaun
WhatcanbesaidaboutIndianwomen?[br][originaltext]Thegamesofacul
HowmanyprovincesandterritoriesdoesCanadahave?[br][originaltext]M:Lind
HowmanyprovincesandterritoriesdoesCanadahave?[br][originaltext]M:Lind
HowmanyprovincesandterritoriesdoesCanadahave?[originaltext]M:Linda,you
Whycouldn’tthemanputonmoreweight?[br][originaltext]F:Henry.why?You
随机试题
YouwillhearJackLester,founderofHindeInstrumentsCorporation,atelescope
U.S.HigherEducationLurkingbehindthegleam
TheHakkapeopleareseenasaunitedpeopleinChinaThischaracterisespe
化学药物治疗女性生殖器恶性肿瘤效果最好的是A.宫颈鳞状细胞癌 B.子宫内膜腺癌
A.酌情停药 B.完全消失 C.无原发病 D.终生 E.半年到1年维生素
患者,女,49岁,患肝病反复发作20余年,近日出现乏力、嗜睡、厌食、脾大、脾功能
以下属于特种地图的是( )。A.绸质地图 B.塑料地图 C.夜光地图 D
对某项目进行敏感性分析,采用的评价指标为内部收益,基本方案的内部收益率为15%,
求助者一般资料:吴某,女性,26岁,某工厂职工,身体健康,无躯体不适。 由同
承包单位对施工合同实施偏差进行分析,其内容包括:产生合同偏差的原因,合同实施偏差
最新回复
(
0
)