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  3. Sam ______ some knowledge of the computer just by watching others working on it.

Sam ______ some knowledge of the computer just by watching others working on it.

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问题 Sam ______ some knowledge of the computer just by watching others working on it.
选项 A、brought up
B、looked up
C、picked up
D、set up
答案C
解析 bring up表示“培育，提出，把……带到楼上，呕吐”；look up表示“查找，改 善，拜访，向上看”；pick up表示“拾起，无意地学会(技术，语言等)”；set up表示“建立，安排， 引起”。由题意可知C是正确答案。句子意思为：Sam仅仅通过看别人操作电脑就无意中学 会了一些电脑知识。
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