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问题 单项选择题

莫斯科成为独立统一的中央集权国家是在( )时期。

A．瓦西里三世

B．伊凡四世

C．底米特里

D．伊凡三世

答案

参考答案：D

单项选择题

A project manager has to resolve two problems. However, both problems can occur in a single trial. In this situation, what is the BEST action the project manager can take

A．Develop a solution for each proble

B．Develop a solution that solves both problem

C．Use a statistically independent tria

D．N0 solution is needed, the two problems cancel each other ou
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单项选择题 A1/A2型题

覆盖义齿的组成不包括（）。

A.人工牙

B.基托

C.卡环

D.固位体

E.连接体
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