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."  
【C14】
选项 A、specific
B、accurate
C、simple
D、explicit
答案A
解析 由本段开头的But看出，本句跟前面存在语义上的转折。上一句提到“该研究首次评估了仅DNA对学习能力的影响”，顺着这个句意，被确认的基因变体就应该不仅仅是“学文算数”基因，A项specific“特定的，明确的”填入空格，能表达这个意思。B项accurate“准确的”通常形容仪器、数据的准确性，用于描述基因不合适。C项simple“简单的”跟下一句的complex矛盾，故也排除。D项explicit“明确表达的”代入空格，句意不通。
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