A.team is（）just a group of people who happen to work together.Teamwork takes practice and it involves special skills.Teams require common processes;they need agreed-upon goals;and they need effective guidance and leadership.The methods for guiding and leading such teams are well known,but they are not obvious.
A.multiple objectives
B.different objectives
C.a single objective
D.independent objectives

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安全防护策略是软件系统对抗攻击的主要手段，安全防护策略不包括（）。
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A.specification
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编译和解释是实现高级语言翻译的两种基本方式，相对应的程序分别称为编译器和解释器。与编译器相比，解释器（）。编译器对高级语言源程序的处理过程可以划分为词法分析、语法分析、语义分析、中间代码生成、代码优化、目标代码生成等几个阶段:其中，代码优化和（请作答此空）并不是每种编译器都必需的。词法分析的作用是识别源程序中的（）。
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