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【简答题】
漏洞是在硬件、软件、协议的具体实现或系统安全策略上存在的缺陷,如果不及时对系统漏洞进行修复,将会带来以下攻击:注入攻击、()、恶意代码传播、()。
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【判断题】铝塑泡罩包装机中,泡罩吸塑成型比吹塑成型效果差。
A.
正确
B.
错误
【判断题】铝塑泡罩包装机中,压缩空气吹塑成型与真空吸塑成型相比,泡罩的壁厚更加均匀,坚固,更适合深泡窝成型。( )
A.
正确
B.
错误
【单选题】弹簧振子的振幅增加一倍,则
A.
振动周期增加一倍
B.
最大速度增加一倍
C.
总能量增加二倍
D.
最大加速度不变。
【单选题】弹簧振子的振幅增加一倍,则( )
A.
振动周期增加一倍
B.
最大速度增加一倍
C.
总能量增加2倍
D.
最大加速度不变
【简答题】听下面一段对话,回答1-3三个小题。 1. Why didn't the woman enjoy herself? [     ] A. She couldn't enter the park. B. She couldn't see the firework clearly. C. She couldn't find her friends. 2. When did the woman get ...
【简答题】阅读理解。 'What's happened to the bottle of medicine?' He couldn't find it in this usual place on a table in the sitting room.' What have you done with it?' he asked his wife. She said she hadn't seen it,...
【简答题】用所给词的适当形式填空。 1.  When she couldn't find her mother, she ______ (begin) to cry. 2.  —When did the movie ______(begin)?    —It _____ (begin) about ten minutes ago. 3.  At the ______ (begin) of this term...
【简答题】听下面一段材料,回答第1至2题。 1. Why is the woman late? A. She missed the bus B. She couldn't start her car C. She couldn't find the key 2. Where are the two speakers? A. At a garage B. At a bus stop C. At a resta...
【多选题】弹簧振子的振幅增加一倍,则
A.
振动周期增加一倍
B.
最大加速度增加一倍
C.
总能量增加二倍
D.
最大加速度不变
E.
最大速度增加一倍
F.
振动频率增加一倍
G.
相位增加一倍
【简答题】二阶系统的闭环传函Φ(s)=25/(s2+s+25),则其单位阶跃响应的超调量δ%= _____ ,调节时间ts= _____ sec(对应5%误差带)。
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