包过滤型防火墙比代理服务器型防火墙效率高,速度快,但是他的缺点是对网络的保护能力有限。( )
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入侵检测技术是一种被动防御技术。( )
A. 对
B. 错
Push strategy requires manufacturers to take middlemen as the main promotion object.
A. 对
B. 错
Personal selling belongs to pull strategy.
A. 对
B. 错
What's the difference between push strategy and pull strategy?