2. 专升本
  3. He has been interested in computer since his childhood, so he specialized______ computer science when he was in college.

He has been interested in computer since his childhood, so he specialized______ computer science when he was in college.

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问题 He has been interested in computer since his childhood, so he specialized______ computer science when he was in college.
选项 A、on
B、at
C、for
D、in
答案D
解析 specialize in专攻；专门研究。
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