题目内容

在一个正确的三段论中，中项要周延几次？（）

A. 至少一次
B. 最多一次
C. 只能一次
D. 多少次都行

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纤维质假发可根据发型的需要使用各种梳理工具。

A. 正确
B. 错误

安全技术交底由（）负责实施，实行逐级安全技术交底制度

1993年，化工学院副院长（）教授被载入《国际名人传记词典》。

A. 王俊德
B. 方志杰
C. 吕春绪
D. 潘婷

You work as an application developer at Certkiller .com. You are developing a collection class named ClientCollection， which is to be used for storing the names of Certkiller .com’s clients that are situated in various geographical areas. These client names are represented by the Client class. You are planning to create a method named SortClients in the ClientCollection class to arrange Client objects in ascending order. You need to ensure that the appropriate interface is implemented by the Client class to allow sorting.What interface should be used？（）

A. IDictionary
B. IComparable
C. IComparer
D. IEqualityComparer