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问题 单项选择题

建设项目采用的技术必须成熟稳定，以保证项目的产品质量性能要求，这体现了建设方案技术比选的( )原则。

A．先进性

B．实用性

C．可靠性

D．安全性

答案

参考答案：C

判断题

制作鸠尾扣的主要目的是最大限度地保留天然牙齿组织。
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选择题

He had intended to do some physics homework during the play, but he soon _____ the play so much that he

forgot all about the homework. [ ]

A. busied himself enjoying 　　　　

B. involved himself to enjoy 　　

C. found himself enjoying　　　　　

D. convinced himself to enjoy

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