试题与答案

下列关于红外线和紫外线的说法不正确的是( ) A.非典隔离病房里,使用紫外线消毒

题型:选择题

题目:

下列关于红外线和紫外线的说法不正确的是(  )

A.非典隔离病房里,使用紫外线消毒

B.儿童常晒太阳,接收紫外线照射,可以促进合成维生素D

C.红外线的主要特性是化学作用强,容易使照相机底片感光

D.一切物体发出的光中都有红外线

答案:

答案:C

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题型:单项选择题

An Intranet is (71) the application of Internet technology within an internal or closed user group.Internets are company and not do not have a (72) connection to the Internet.Usedproperly an Internet is highly effective corporate tool,capable of regularly (73) information toempower the workforce with the information needed to perform their roles.Used in this Way,Internet represent a step towards the (74) office.

A.update

B.updated

C.updates

D.updating

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