分析 文章大意:
本文主要介绍的是基因和性状之间的关系.作为一个人,有一半的基因来自于父亲,有一半的基因来自于母亲,有的基因是显性的,比如黑色的头发和棕色的眼睛,所以性状比较常见,有的是隐性的,如蓝色的眼睛,性状比较少见.
解答 31.A,词义猜测题,文中提到"They passed their traits on to you through genes"父母的traits通过基因遗传给后代,我们知道,通过基因遗传的是性状,所以traits应该是个性、显著的特点的意思,由此确定选择A.
32.A,推理判断题,文中提到"Brown eyes are dominant over blue eyes.Dark hair is more common"控制棕色眼睛性状的基因是显性基因,黑发更为普遍,由此我们可以知道众人中常见的性状是黑发,棕色的眼睛,选择A.
33.B,主旨大意题,文中提到"Genes help to make you who you are"基因使得你成为独一无二的,并且文章通篇都在介绍基因和性状之间的关系,由此确定答案为B.
点评 对于阅读表达题,一定要记得首先通读全文,了解文章大意,然后再根据文章关键词,关键句,掌握细节问题,并进行推理判断,再去回答具体的问题.
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