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问题
问答题 简答题
影响信息系统安全的主要因素有哪些?
答案
参考答案:
环境因素;人为因素;技术和管理因素。
仿写题,造句
用所给单词和句子重新写句子。
sometimes always usually never
1. She eats soup.
2. The bus driver says hello to me.
3. I ride a bicycle to school.
4. Jenny has her boots and umbrella.
5. Danny and Li Ming wear dresses.
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单项选择题
瓷器:黏土
A.空气:氧气
B.桌子:木头
C.水杯:玻璃
D.布:棉花
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