In contrast to Dr. Connolly's study, the previous ones failed to ______.
A. make a comparison between the experience of scientists in others kinds of laboratory and that of those in universities
B. make themselves more eligible for promotion
C. make a difference for a woman to settle into a professorial chair
D. make the supposedly egalitarian world of academia deliver more equality
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Which of the followings is a determining factor in terms of the prospect of the screening
A. Their efficiency.
B. Their brand.
C. Their output.
D. Their component.
According to the text, the old Army Field Manual lacks ______.
A. some forms of degrading treatment of prisoners
B. the trials of time by the CIA
C. torture by army personnel in Abu Ghraib
D. specific ban on "water-boarding"
The word "albeit" in the first sentence of the second paragraph most probably means ______.
A. although
B. once
C. if
D. as
下列说法中，正确的是A．进程之间同步，主要源于进程之间的资源竞争，是指对多个相关进程在执行次序下列说法中，正确的是
A. 进程之间同步，主要源于进程之间的资源竞争，是指对多个相关进程在执行次序上的协调
B. 信号量机制是一种有效的实现进程同步与互斥的工具。信号量只能由P\V．操作来改变
C. V操作是对信号量执行加1操作，意味着释放一个单位资源，加1后如果信号量的值小于等于0，则从等待队列中唤醒一个进程，现进程变为等待状态；否则现进程继续进行
D. 临界区是指每次仅允许一个进程访问的资源
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