过大保护电位将防腐层与金属表面的黏结力受到破坏，产生（）剥离。
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我国第一部关于学位的法律是1980年公布的《中华人民共和国学位条例》。
A. 正确
B. 错误
Which of the following best describe the customer benefits of change management in the operate phase？ Select exactly 1 answer（s） from the following：（）。
A. reduce unnecessary disruption， delays， rework， and other problems by establishing test cases for use in verifying that the system meets operational， functional， and interface requirements
B. improve its ability to make sound financial decisions by developing a business case based on its business requirements and establishing a basis for developing a technology strategy
C. reduce operating costs and limit change-related incidents by providing a consistent and efficient set of processes
D. improve the return on investment and hasten migration by identifying and planning for necessary infrastructure changes and resource additions， as well as reduce deployment costs by analyzing gaps early in the planning process to determine what is needed to support the system
（）年，教育部召开了第一次中小学教材规划会议，决定将教材的国定制度转变为审定制度，改变统编模式，实行“一纲多本”。从此，我国的教材建设由统一走向多样化。
A. 1989
B. 1988
C. 1958
D. 1990
煤矿企业必须以安全促生产，以安全促效益，以安全促稳定，使煤矿工作（）
A. 整体推进
B. 全面发展
C. 文明生产
D. 安全生产
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