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【单选题】
有关X线对比度指数特点的叙述，正确的是A.
管电压升高，对比度指数上升
B.
软组织间的对比度指数较大
C.
使用低kV摄影，可提高对比度指数
D.
肺部高kV摄影，对比度指数上升
E.
骨骼用120kV摄影，对比度指数最大
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【单选题】What does the author think about experimenting on apes?
A.
It should be stopped.
B.
It should not be stopped unless apes are shown to have a consciousness like our own.
C.
The medical advances gained are outweighed by the suffering of the apes.
D.
It is akin to experimenting on orphan children.
【简答题】The author argues that our bodies have stopped evolving because
【简答题】Facebook promised to get consent (permission/agreement) from users before sharing their data with third parties, and to avoid ______________ (adj. 欺骗性的) claims about its privacy practices.
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