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Autism (儿童自闭症) is a serious mental illness, especially of children, in whi
Autism (儿童自闭症) is a serious mental illness, especially of children, in whi
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2024-05-30
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问题
Autism (儿童自闭症) is a serious mental illness, especially of children,
in which one becomes unable to communicate or form relationships
with others. There has been alarming rise in autism rates in the U. S. and 【S1】______
some other developed nations recently, which have come one of the most 【S2】______
anguishing mystery of modern medicine, and the source of much desperate speculation 【S3】______
by parents. In 1970, the incidence of autism was thought to be just 1 in
2,500; today about 1 in 170 kids born in the U, S. is down by autism. 【S4】______
According to a recent study performed by Cornell University, autism can be
caused by watching too much television at a tender year. "Approximate 17% of 【S5】______
the growth in autism in California and Pennsylvania during the 1970s and 1980s
was due to the growth of cable television". This is further supported by the fact
which at present around 40% of autism diagnoses in the two states studied is the 【S6】______
result of television watching due to precipitation.
There aren’t yet unreliable large-scale data on the viewing habits of kids 【S7】______
aging 1 to 3—the period when symptoms of autism are typically identified, but 【S8】______
the researchers are not at all discouraged. Once this fact becomes more obvious,
it’s time for parents to really take it serious and take actions to protect their 【S9】______
children off this serious illness. 【S10】______ [br] 【S2】
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答案
have→has
解析
一致问题。该句是个非限定性定语从句,主语which指代的是前面句子说明的一个事实,所以谓语动词应该用单数形式。此句意思为“这(自闭症发病率的大幅度增加)已经成为令当代医学界头痛的一大难解之谜”。
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