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  3. Children have been said to have brain-injured child syndrome, hyperactive (极

Children have been said to have brain-injured child syndrome, hyperactive (极

游客2024-05-22  14
问题     Children have been said to have brain-injured child syndrome, hyperactive (极度活跃的) child syndrome and attention-deficit disorder (ADD). As early as the 1940’s, psychiatrists have【C1】______children with hyperactivity and extremely distracted and impulsive. These frequent name changes show how【C2】______researchers are about the causes of the problem and the diagnostic (诊断的)【C3】______for the disorders.
    In the past several years, the people who study attention deficit hyperactivity disorder (ADHD) have【C4】______to clarify the disorder’s causes and【C5】______. and have reasons to believe that it may be【C6】______. Today’s view on this disorder is very different from the beliefs of just a few years ago.
    Researchers are finding that ADHD is not a disorder of just attention, but is from a developmental【C7】______in the brain’s circuitry and self-control. The loss of self-control【C8】______other important brain functions compulsory for【C9】______attention. ADHD【C10】______two sets of symptoms: inattention and a【C11】______of hyperactive and impulsive behaviors. Most children are more active and【C12】______than adults are. Children are more inconsistent,【C13】______by brief actions. The younger the child, the【C14】______aware they are. This behavior is a【C15】______of a problem when it is displayed more in them than in their【C16】______. Boys are at least three times more【C17】______than girls to have ADHD. Studies have found that ADHD in boys outnumbers girls 9 to 1; this is because boys are genetically likely to develop disorders in the nervous system. These behaviors【C18】______occur between the ages of 3 and 5.【C19】______, some children don’t start to develop the disorder until late childhood or early adolescence. Researchers are unable to find the reasons for this【C20】______. [br] 【C4】
选项 A、initiated
B、commenced
C、originated
D、embarked
答案 B
解析 语义衔接题。前文中提到，研究者对于儿童的这些病症还不是很清楚。本句说在过去的几年里，ADHD研究者们应该是开始弄清楚了，故答案为[B]commenced“开始，着手”，后接动名词或不定式。[A]initiated“开始”重在强调“创始，发起”；[C]originated“创始，开创”强调变化的根源；[D]embarked“从事”。
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