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【单选题】
Inerting means ______．A.
The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume
B.
The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume
C.
The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo
D.
All of the above
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【简答题】电气图样中的粗实线、细实线、虚线、点划线、双点划线各表示什么意思？
【简答题】考虑由n个进程共享的具有m个同类资源的系统， 证明：如果对i=1，2，…，n，有Needi>0而且所有最大需求量之和小于m+n，那么该系统是死锁无关的。
【简答题】产品的整体概念,体现了以________为中心的现代市场营销观念。
【单选题】According to the passage, abstinence education
A.
means abstinence plus-contraception.
B.
has long-term beneficial impacts on young people's sexual behavior.
C.
includes family planning, HIV/AIDS and other sex education.
D.
is an important election's 'moral values' issue of Bush's re-election.
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