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[单选题]
12.流套接字提供的数据流服务是双向的、有序的、无重复的和
A
A.不可靠的 B.不安全的C.有记录边界的 D.无记录边界的
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试题答案:
D
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一、单项选择题(本大题共20小题,每小题2分,共40分) 在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。错选、多选或未选均无分。 1.采用时间片轮转方式处理用户请求的操作系统是
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15.商业银行为客户办理因债权债务引起的与货币收付、资金划拨有关的收费业务是
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企业经营安全程度的判断指标一般是采用()
3.
Passage Three Doctors have known for a long time that extremely loud noises can cause hearing damagc or loss. The noise can be the sound ofa jet aiphne or machines in factories or loud music or other common sounds at home and at work. A person only needs to hear the noise for a litle more than onc scond to be alected. An American scientist has found that using aspirin (阿斯匹林) can incrcease the temporary (暂时的) hearing loss or damage from loud noise. He did an experiment, using a number of male students at a university who all had normal hearing. He gave them different amounts of aspirin for different periods of time, and then he tested their bearing ability. He found that the students who were given four gams of aspirin a day for two days suffered much geater temporary bearing loss than those who did not use aspirin. The hearing loss was about two times as great.The scientist said millions of people in the United States use much larger amounts of aspinn than were used in the study. He sid these pcople face a serious danger of sufring hearing loss from loud noise.
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Having been attacked by terrorists, ________ .
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适应性维护约占整个维护工作的( )
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