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
58
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
TheEnglishauthor(writer),RichardSavage,wasoncelivinginLondoningr
Weshouldhelpothersasmuchaswecan.[br]Themallwascomingupfromthevi
Somanypeopleare______withGoogle,thelargestsearchenginethatprovidesth
EQEQisinnate.Infantsasyoungasthreemonthsshowempathy.Nowhereis
实现货物位移的功能,体现出运输的()。A.空间效用 B.时间效用 C.经
教师的道德水平主要影响学生的道德成长,而学生的智能发展则不受教师的道德水平影响。
《洪湖水浪打浪》由张敬安、欧阳谦叔作曲,选自歌剧( )。A.《采莲曲》 B.
葛根的功效,以下说法错误的是()A.解肌退热 B.升阳止泻 C.透疹
A.马兜铃科B.小檗科C.报春花科D.唇形科E.爵床科金钱草来源于()。
人都不可能不丧失理性,不一定所有人都会完全丧失理性。 如果上述断定为真,则以下
最新回复
(
0
)