视觉适应是我们熟悉的一种感觉现象。它是由于刺激物质持续作用而引起的感觉性的变化。在视觉范围内，可区分为暗适应和明适应，暗适应是指照明停止或由亮处转入暗处时视觉感觉性提高的时间过程。明适应和暗适应相反，是指照明由暗处转入亮处时人眼感受性下降的时间过程。下列不属于明适应的是：
更多“What is an open reading frame (ORF)?”相关的问题 第1题 What is the passage? A.An opening speech of a lecture. B.The text of the economist’s speech. C.A discussion on inflation and investment. D.The interpretation of the phrase "economic depression". 点击查看答案 第2题 【...
WhileDAWNCafewas 8 (original)onlyopenforatrialrun, 9 (it)goalistofounda permanentlocationsoon.Afterall,theybroughtinover900customersinlessthantwoweeks! We hopethisamazingideawillenjoygreat 10 (popular)allaroundtheworld. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 高中英语 选择性必修 第二册 第57页...
An open reading frame is the portion of mRNA that is translated to form proteins. Many other portions of DNA contain non-coding regions. These non-coding regions may have functions such as recognition sites for alternative splicing, which allows gene products to be assembled in different ways. ...
18 Teachachildinreading.Takenotesfora disabledclassmate.Youmightbesurprisedatthe connectionsyoumakeafterreachingoutinthese ways. 19 Lonelinessisanabsenceofquality friendships,not of a particular quantity of friends.That?swhyit?simportanttoknowhowto selectafriend.The bestfriendshipsarethose basedonsimilarval...
Unit 2 what is a gene基因是什么 Unit2Whatisagene?“Gene”的妙译★Gene[dʒi:n]:基因。★译者：摩尔根的弟子谈家桢院士。★妙处：兼顾语音和词义。Definition1860s–1900s:Geneasadiscreteunitofheredity Theconceptofthe―gene‖hasevolvedandbecomemorecomplexsinceitwasfirstproposed.Therearevariousdefinitionsof...
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is fresh. I usually open the window to enjoy the wind and sunshine, which will help cool down my room without an air conditioner. Since I spend most of my time staying at home, my room means the whole world to me. It’s like a friend who is always there to share ups and downs ...
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Our son is a little --unique. KI-WOO Unique is good. YON-KYO He has trouble focusing. ADHD. We signed him up for the Cub Scouts hoping the discipline would help, but he’s become an even bigger weirdo. Now he’s obsessed with Indians-- KI-WOO (laughs) The Scouts have ...