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【单选题】
等速运动规律是凸轮机构中最简单的运动规律,但是等速运动规律存在( )
A.
刚性冲击
B.
柔性冲击
C.
没有冲击
D.
以上都不对
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B.
防火墙能阻止来自内部的威胁;
C.
防火墙能提供VPN功能;
D.
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D.
硫酸铈法
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避免高锰酸钾的干扰
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A.
防火墙能隐藏内部IP地址
B.
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C.
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【单选题】关于防火墙,以下哪种说法是错误的?( )
A.
防火墙能阻止来自内部的威胁
B.
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D.
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A.
避免高锰酸钾的干扰
B.
避免糖类的干扰
C.
提高结果的准确度
D.
排除硬脂酸镁的干扰
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