题目内容

It would be completely__________ (responsible)to use drugs on people that
had not been tested on animals.

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The project is only__________ (theory)workable.

[x]补=11．000000，它代表的真值是_________。

A. +3
B. -1
C. -64

无缝线路长轨条焊缝部位要保持平直，使用小型打磨机打磨后，用1m直尺测量，Vmax小于等于120km/h线路，工作边矢度不得大于（）。

A. 0.1mm
B. 0.5mm
C. 0.3mm
D. 0.2mm

Scholars offer three related but different opinions about different opinions about the__________ (mystery)origin and significance of these paintings.