首页/ 题库 / [名词解释题]scanning electron mi的答案

scanning electron microscope;SEM (扫描电子显微镜)

名词解释题
2021-09-02 20:40
查看答案

正确答案

是1965年发明的较现代的细胞生物学研究工具,主要是利用二次电子信号成像来观察样品的表面形态,即用极狭窄的电子束去扫描样品,通过电子束与样品的相互作用产生各种效应,其中主要是样品的二次电子发射。二次电子能够产生样品表面放大的形貌像,这个像是在样品被扫描时按时序建立起来的,即使用逐点成像的方法获得放大像。扫描电子显微镜的制造是依据电子与物质的相互作用。


试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

Other companies use Web technology to ______ business electronically at the wholesale or retail level.
biomembrane,or biological membrane (生物膜)
药理学的研究方法包括()、生物化学方法、形态学方法、电生理学方法、行为学方法。
一项关于吸烟与肺癌关系的病例对照研究,研究结果表明OR为4.0,其意义是()
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
病例对照研究进行统计性推断时不匹配分层资料总的OR值计算公式是
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
If he is a common carrier,he is absolutely responsible to the owner of the goods carried ()any loss or damage to them unless caused by an Act of God or the Queen’s enemies,or the inherent vice in the goods themselves,or the negligence of the owner of the goods,or a general average sacrifice.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss,damage or delay has been caused by the improper or negligent stowage of the goods.This means that().
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
()shall be liable for loss of and damage to the Vessel and/or goods arising or resulting from inaccuracies in stating the description,quantity,weight,measurement or contents.
Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo,without the authorization or privity of the Shipowner or his agent,is().
广告位招租WX:84302438

免费的网站请分享给朋友吧