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题目内容 (请给出正确答案)
A well-designed system should be( ).①easily understood②reliable③straightforward to implement④straightforward to maintain

A.①②
B.①③④
C.②③④
D.①②③④

参考答案

参考解析
解析:题意为:一个好的设计模式应该是:easily understood:易于理解;Reliable:可靠的;straightforward to implement:易于实现的;straightforward to maintain:易于维护的。
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