2. 外语
  3. Some people think depression is ______. What do some doctors think is the real cause for people to feel depressed?

Some people think depression is ______. What do some doctors think is the real cause for people to feel depressed?

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问题 Some people think depression is ______.
What do some doctors think is the real cause for people to feel depressed?
选项 A、Unhappy events happening in one’s life.
B、A lack of balance of a chemical in one’s body.
C、Difficulty in concentrating on something.
D、Sad feelings, lacking energy and eating disorder.
答案B
解析 本题为细节题。在文章第二段第三句话“Many doctors believe that one thing that may cause depression is an imbalance of serotonin(血清素)—a chemical in your body．”明确给出了此题的答案，选项C与这句话意思相符，imbalance与lack意思相同。
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