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[单选题]
2.安全性是管理信息具有的基本性质，其含义是
A
重要信息内容正确无误且无遗漏
B
信息来源安全可靠且无干扰数据
C
能防止未授权用户接触和使用信息
D
合法用户可以检验信息的正确与否
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试题答案：
C
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收割战略适用于（）战略单位。
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Laziness is a sin, everyone knows that. We hare probably had all lectures 1.____ that laziness is immoral, that it is wasteful, that lazy people will never amount to 2.____ in life. But laziness can be more harmful than the, it is often caused by more complex reasons than simple wishes to avoid work. Some people who appear to be lazy are 3.____ much more serious problems. They may be so distrustful of their fellow workers that they are unable to join in any group task 4.____ ridicule or fear of having their ideas stolen. These people who seem lazy may be paralyzed by a fear of failure. 5.____, laziness can actually be helpful. Some people may look lazy when they are really thinking, planning, contemplating, researching. We should all remember that some great scientific discoveries occurred 6.____ or while someone was "goofing off(闲荡)". Newton wasn't working in the orchard when the apple hit him he devised the theory of7.____. All of us would like to have someone "lazy" build the car or stove we buy, particularly if that laziness were caused by the worker' s 8.____ to check each step of his work to do his job right. sometimes being lazy--that is, taking time off for a rest--is good for the overworked students or executives. Taking a rest can be particularly 9.____ to the athlete who is trying too hard or the doctor who's simply working himself overtime too many evenings at the clinic. So be careful when you're 10.____ to call someone lazy. That person may be thinking, or planning his or her next book.1. A. handing out B. standing out C. pointing out D. bringing out
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