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【单选题】
“将一项特定的生产或经营活动按步骤或阶段顺序以若干个模块形式组成一个流程图系列，在每个模块中出各种潜在的风险因素或风险事件，从而给决策者一个清晰的总体印象”是指风险识别的（）方法。
A.
专家调查法
B.
流程图法
C.
初始清单法
D.
经验数据法
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Update the virus signatures.
D.
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【单选题】Even though most universities retain the royalties from faculty members inventions, the faculty members retain the royalties from books and articles they write. Therefore, faculty members should retai...
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Royalties from inventions are higher than royalties from educational software programs.
B.
Faculty members are more likely to produce educational software programs than inventions.
C.
Inventions bring more prestige to universities than do books and articles.
D.
In the experience of most universities, educational software programs are more marketable than are books and articles.
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In terms of the criteria used to award royalties, educational software programs are more nearly comparable to books and articles than to inventions.
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【多选题】关于前瞻性和回顾性队列研究的叙述,说法正确的是
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前瞻性队列研究的观察方向是从“因”到“果”
B.
回顾性队列研究的观察方向是从“果”到“因”
C.
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属于观察法
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是从“因”求“果”的研究
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在验证病因假设方面比病例对照研究更有说服力
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【单选题】轴上点发出的光束形为 , (有/无)对称轴。 轴外点发出的光束形为 , (有/无)对称轴。
A.
圆锥面，有，圆柱面，无
B.
圆锥面，无，圆柱面，有
C.
圆柱面，无，圆锥面，有
D.
圆柱面，有，圆锥面，无
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【判断题】Once you connect your computer to the Internet , it is likely to contract a virus even though you haven’t download anything.
A.
正确
B.
错误
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【单选题】There are usually ______ witnesses to the computer crime, even though it may be taking place in a room filled with people.
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many
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a number of
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a lot of
D.
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【单选题】A user has discovered that even though they are using the latest version of the anti-virus software,the computer is still being infected by a virus. Which of the following is the BEST solution for thi...
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金属钠可以保存在少量水中
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【多选题】关于前瞻性和回顾性队列研究的叙述,说法正确的是
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【多选题】关于队列研究的叙述，说法正确的是（）。
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属于观察法
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是从“因”求“果”的研究
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在验证病因假设方面比病例对照研究更有说服力
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【单选题】轴上点发出的光束形为 , (有/无)对称轴。 轴外点发出的光束形为 , (有/无)对称轴。
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圆锥面，有，圆柱面，无
B.
圆锥面，无，圆柱面，有
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圆柱面，无，圆锥面，有
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圆柱面，有，圆锥面，无
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【判断题】Once you connect your computer to the Internet , it is likely to contract a virus even though you haven’t download anything.
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【单选题】There are usually ______ witnesses to the computer crime, even though it may be taking place in a room filled with people.
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