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问题 多项选择题

根据《安全标志及其使用导则》第4.5.2条规定，文字辅助标志横写时，（）为白色字。

A.禁止标志

B.警告标志

C.指令标志

D.提示标志

答案

参考答案：A, C

单项选择题

燃气工程中，燃气管道的输送压力属于高压A级的为（　）。

A．0.3Mpa

B．0.5Mpa

C．0.7Mpa

D．0.9Mpa
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单项选择题

Software quality assurance is now an (50) sub-discipline of software engineering. As Bucldy and Oston point out, (51) software quality assurance is likely to lead to an ultimate (52) of software costs. However, the major hurdle in the path of software management in this area is the lack of (53) software standards. The development of accepted and generally applicable standards should be one of the principal goals of (54) in software engineering.

54（）

A．management

B．planning

C．production

D．research
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