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
0
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
对迟复邀请表示歉意说明:以李东的名义给陈韵写一封信。为迟复邀请表示歉意,并接受邀请。内容:1.没有及时回复陈韵发来的出席11月30日晚宴
Thespeechacttheorywasfirstputforwardby______.A、JohnSearleB、JohnAusti
Lastyear’seconomyintheUnitedStatesshouldhavewontheOscarforbest
白芷内酯的结构分类上属于A.吡喃香豆素 B.双环氧木脂素 C.简单香豆素
下列情形属于盗窃罪既遂的是A.甲在火车上趁对面乘客睡觉,将其行李箱扔出窗外,不料
我国三类教育中,2016—2020年招生人数年均增速最快的一类,其2020年
理财人员向客户提供理财顾问服务后,客户根据理财顾问服务来管理和运用资金,所产生
根据印花税法律制度的规定,下列各项中,应当征收印花税的是()。A.甲公司与乙公
关于设备采购质量控制的说法,正确的是( )。A、市场采购设备,主要用于非标准设备
(2018年真题)依据《通用安装工程工程量计算规范》(GB50856—2013)
最新回复
(
0
)