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【单选题】
在剖视图中,内螺纹小径用( )绘制A.
粗实线
B.
细虚线
C.
细实线
D.
粗虚线
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举一反三
【单选题】According to text, what is beyond the ability of Europe's failing firms now is ______.
A.
to defect American competitive rivals.
B.
to comply with different laws.
C.
to escape the control of governments.
D.
to negotiate with their creditors.
【简答题】当一束自然光以布儒斯特角入射到两种媒质的分界面上时，就偏振状态来说反射光为__________光，其振动方向________于入射面．
【单选题】Which of the following is implied in the text?
A.
Europe as a whole turns its back on poor immigrants.
B.
European countries have a standard for political safety.
C.
Germany only handles applications of persecuted migrants.
D.
Other European governments will follow Germany's suit.
【简答题】自然光以布儒斯特角入射到两种媒质的分界面上时,就偏振状态来说反射光为完全偏振光,其振动方向 _______ 于入射面。
【单选题】自然光以布儒斯特角入射两种媒质的界面，反射光的偏振状态是【】【图片】
A.
部分线偏振光，光矢量垂直入射面的分量多一些。
B.
成为线偏振光，光矢量平行入射面的分量多一些。
C.
线偏振光，光矢量平行入射面。
D.
线偏振光，光矢量垂直入射面 。
【简答题】当一束自然光以布儒斯特角入射到两种媒质的分界面上时，就偏振状态来说反射光为（）光，其振动方向（）于入射面。
【单选题】自然光以布儒斯特角入射两种媒质的界面，反射光的偏振状态是【 】【图片】
A.
部分线偏振光，光矢量垂直入射面的分量多一些
B.
部分线偏振光，光矢量平行入射面的分量多一些
C.
线偏振光，光矢量平行入射面
D.
线偏振光，光矢量垂直入射面
【单选题】It can be inferred from the text that Europe's quest for more liberal economies may be ______.
A.
popular and sensible.
B.
dubious but profitable.
C.
slow and contradictory.
D.
fragile but promising.
【单选题】We can learn from the text that road accidents in Europe are mainly caused by _____.
A.
drivers falling asleep at the wheel
B.
long-distance lorry driving
C.
cars without a safety system
D.
drivers' sudden changes in steering
【单选题】In the last six to nine months，teens in the US to text messaging in numbers twice that in Europe and Asia．
A.
took
B.
have taken
C.
had taken
D.
would take
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