2. 外语
  3. It is very important to______carefully to get a sharp picture.

It is very important to______carefully to get a sharp picture.

admin2014-02-11  43
问题 It is very important to______carefully to get a sharp picture.
选项 A、focus
B、object
C、preserve
D、fix
答案A
解析 focus“调焦”；object“反对”；preserve“保护”；fix“固定”。
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