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【单选题】
关于转基因食品的描述不正确的是 ( )A.
转基因是将一种人类所需要的外源基因，导入动物或植物体的细胞内，从而获得生物性
B.
变
C.
转基因技术实质使用基因工程或分子生物学技术，将遗传物质导入活细胞或生物体中，
D.
基因重组现象，并使之表达并遗传的相关技术
E.
转基因食品是指采用转基因技术开发的食品或食品添加剂
F.
转基因食品不能食用
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【简答题】软件危机出现于60年代末，为了解决软件危机，人们提出了【 】的原理来设计软件，这就是后期软件设计的基础。
【简答题】软件危机出现于60年代末，为了解决软件危机，人们提出了 【3】 的原理来设计软件，这就是软件工程诞生的基础。
【简答题】B There are some places in the world where great cities once stood.There were gardens,trees and grass.But now these cities have gone and the places are like deserts.Scientists began to study this land...
【单选题】More engineers and scientists ____ to the African countries next yea r.
A.
will send
B.
will be sent
C.
sent
D.
were sent
【单选题】Many leading scientists down through the years from Galileo to Einstein have been deeply religious. They have been intrigued by the essential mystery of life and material existence, and have recognize...
A.
have acknowledged that only religion can explain the mystery of life
B.
have been puzzled by the mystery of life and material things
C.
have attempted to explain physical life from a religious point of view
D.
have been so intrigued as to make great efforts to solve the mystery of life
【简答题】'The world's oceans are slowly getting more acidic．”say scientists．The researchers from California report that the change is taking place in response to higher levels of carbon dioxide in the atmosphe...
【单选题】All scientists follow the same basic research principles as they pose questions, conside r possible answers, and ______ .
A.
gathering evidence
B.
evidence is gathered
C.
gather evidence
D.
with gathering evidence
【简答题】软件危机出现于60年代末，为了解决软件危机，入们提出了【 】的原理来设计软件，这就是软件工程诞生的基础。
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