选择题:21. When I tried to find _______that prevented so

题目内容:

21. When I tried to find _______that prevented so many people from taking part in the program, it
seemed to me that there were two main reasons.( )(本题3.0分)
A、 why it did
B、 that it did
C、 what it was
D、 why it was
参考答案:

在Word中的“插入”|“图片”命令不可插入( )。A、公式B、剪贴画C、艺术字D、自选图形

在Word中的“插入”|“图片”命令不可插入( )。A、公式B、剪贴画C、艺术字D、自选图形

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某段距离丈量的平均值为100m,其往返较差为+4mm,其相对误差为( )。A、1/25000B、1/

某段距离丈量的平均值为100m,其往返较差为+4mm,其相对误差为( )。A、1/25000B、1/25C、1/2500D、1/250

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