2. 考研
  3. A set of genes play a role in learning to read and do math, but this ability is not just gene-driven,【C1】________schooling and h

A set of genes play a role in learning to read and do math, but this ability is not just gene-driven,【C1】________schooling and h

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问题     A set of genes play a role in learning to read and do math, but this ability is not just gene-driven,【C1】________schooling and help from parents are also vital【C2】________.
    Early mathematical ability and literacy are known to【C3】________in some families, but the genes【C4】________affect this have until now been【C5】________unknown.
    Scientists looked into a data pool called the Twins Early Development Study, which【C6】________12-year-olds from nearly 2,800 British families.
    The team compared twins and【C7】________children to see how they【C8】________in tests for maths and reading comprehension, and then matched the children’s genomes.
    Between 10 percent and half of the genes in-volved in reading were also involved in math, they found, and tiny variants in these【C9】________genes influence skill level.
    【C10】________it’s also clear how important our life experience is in making us better at one or the other. It’s this complex【C11】________of nature and nurture as we grow up【C12】________shapes who we are.
    Professor Robert Plomin said the study was the first to estimate the【C13】________from DNA alone on learning ability.
    But, he stressed, the genetic valiants that were identified were not【C14】________"literacy or numeracy" genes.
    【C15】________they formed part of a more complex mechanism in which many genes each【C16】________a small, but combined, effect on learning ability.
    "Children differ【C17】________in how easy or difficult they find learning, and we need to recognize and【C18】________these individual differences," said Plomin.
    "Heritability does not【C19】________that anything is set in stone—it just means it may take more effort from parents, schools and teachers to【C20】________the child up to speed."  
【C2】
选项 A、reasons
B、roots
C、contributors
D、donators
答案C
解析 上文提到了基因的作用，but后说not just gene-driven，意即还有其他的因素，因此推断空格处应填入跟driven语义相近的词，四个选项中，C项contributors“起作用的事物”符合要求，表示“学校教育”和“家长的帮助”起到了重要作用，故选C。A项reasons通常指行动或事件的起因和理据，用于此，不能表达“学校教育”和“家长的帮助”的推动作用，故排除。B项roots可以指代事情的源头和根本原因，这在逻辑上把基因的重要作用排除了，故逻辑不符。D项donators指贡献或捐赠钱或物的人，不符合搭配。
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