B.recommendation
C.defence
D.comment
答案 B
解析 句意为:由于很多孕妇本身缺乏维生素D,(因此)美国儿童学会最近提出了维生素D摄入的推荐量。order命令;recommendation推荐;defence防御;comment评论。根据下文中的“for babies and children from 200 IU to 400 IU and for adults from 800 IU to 1,000 IU”可知,此处指的是摄入维生素D的推荐量,故答案为B项。
Ⅲ.阅读理解
Can feeling of nostalgia(怀旧) be good for you?Or is it unhealthy to have a strong love for the past?
For years,medical experts have studied nostalgia and the reasons for it.Many experts warn that too much nostalgia is harmful.They say linger(徘徊) in the past shows that a person is unhappy with his present life.These feelings keep the person from living his life to its fullest.
Dr.Louise Kaplan has written several books about nostalgia.She says these feelings often begin when a young person is between 13 and 19 years old.
“This is the time when you must face the loss of your childhood,” Kaplan says.“You see your new life is easily destroyed.But you think romantically about a golden past.You remember your childhood as a time when life was perfect.”
These feelings continue as a person gets older,Kaplan adds.She says many grown persons have a hard time keeping up with changes in the modern world,so they think back to their younger years.At that time the world seemed simple and more harmless.
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