经过严密的软件测试后所提交给用户的软件产品中()
A、软件不再包含任何错误
B、还可能包含少量软件错误
C、所提交给用户的可执行文件不会含有错误
D、文档中不会含有错误
参考答案:B
(2013·济南二模)It was during the Ming Dynasty ________ the Great Wall was repaired and extended to take on the appearance it has today.
A.when
B.which
C.what
D.that
特种作业人员必须经()并考核合格,取得《中华人民共和国特种作业操作证》后,方可上岗作业。
A、专业技术培训
B、专门的安全技术培训
C、岗前理论培训