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【单选题】
在10～100keV光子能量范围内，光子能量在10keV时光电吸收力95%以上，康普顿吸收为5%。光子能量为100keV时，康普顿吸收占95%以上。被照体因素（原子序数、密度、厚度）所形成的对比度称为（）A.
胶片对比度
B.
X线时比度
C.
物体对比度
D.
光学对比度
E.
人工对比度
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【单选题】Job or money? Would you quit your job if you didn’t need the money?In a 1990 poll by the Gallop 0rganization，many people said quitting work was an important reason to he rich． Yet researehers find tha...
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Job or money? Would you quit your job if you didn’t need the money?In a 1990 poll by the Gallop Organization，many people said quitting work was an imprtant reason to be rich．Yet researchers find that ...
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】现代都市快节奏的生活频率和人际交往的复杂化倾向越来越明显，人们面临的突发事件和信息爆炸情况越来越多，这很容易给人们的心理带来不适应感和挫折感，从而产生各种人际交往问题。在这些问题当中，自我封闭是相对突出的，并且是对人们的身心健康危害较大的交往障碍之一。这段文字讨论的重点是：（ ）
A.
人的心理
B.
都市生活
C.
自我封闭
D.
身心健康
【简答题】电缆线路上所使用的电缆附件，均应符合国家或部颁的（）并有合格证件。
【单选题】The reason he quit the job is______ he hadn ’ t got promoted for 5 years.
A.
why
B.
because
C.
that
D.
because of
【简答题】In some universities, students are asked to sign an Honesty Declaration in the exam. Do you think this is an effective way to pr cheating?Why or why not?
【单选题】— Why didn't you stop Mary cheating in the final exam? — But what _____ otherwise? She just sticks with Alex and turns a deaf ear to my advice. [ ]
A.
could I do
B.
must I have done
C.
could I have done
D.
should I do
【单选题】What method do universities around the world not use to deal with cheating and plagiarism?
A.
anti-plagiarism software
B.
strict cheating policies
C.
rigorous plagiarism rules
D.
heart-to-heart talk with the students
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