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【单选题】
下面关于操作系统的叙述中正确的是()A.
批处理作业必须具有作业控制信息
B.
分时系统不一定都具有人机交互能力
C.
从响应时间的角度看，实时系统与分时系统差不多
D.
由于采用了分时技术，用户可以独占计算机的资源
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【简答题】Babies who are breast-fed may be more likely to be successful in life, a new study published Tuesday suggests. The study followed more than 3,000 babies into hood in Brazil. The researchers found...
【简答题】Both the young and the old may feel lonely. A three-year-old child will feel lonely when it is left alone, and an old man over eighty years old is often afraid to live alone, too. Some people feel lon...
【单选题】下列选项中,属于百货商店的特征的有 ( ) 。
A.
一般的服务，中等的价格
B.
服务齐全，价格昂贵
C.
较少的服务，低廉的价格
D.
自我服务，较低的价格
E.
在线自购，无需服务
【单选题】The Fed may feel pressure to support the president's policies since the president can __________.
A.
dismiss members of the Board of Governors appointed by previous presidents.
B.
appoint a new chairman of the Board of Governors immediately after taking office.
C.
veto legislation that might limit the Fed's discretionary authority and power.
D.
do all of the above.
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