题目内容

在烘焙“哥斯达黎加”咖啡豆时，待到锅炉温度上升至150℃，应将火力调整至（）℃，并做好记录。

A. 100
B. 120
C. 150
D. 180

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在烘焙“哥斯达黎加”咖啡豆时，待到锅炉温度上升至130℃时，需要将风门刻度调整至（），并做好记录。

A. 7
B. 8
C. 9
D. 10

Operation & Maintenance is the process of modifying a software system ________, aiming to correct faults, improve performance or adapt to a changed environment.

A. before implementation
B. after delivery
C. during testing
D. after testing

Software requires periodic ________ to ensure it continues to run smoothly and reduce the occurrence of problems.

A. refreshment
B. fresh
C. refreshness
D. refreshes

________is the reactive modification of a software product performed after delivery, to correct any discovered problems, such as bugs and logical errors.

A. Corrective maintenance
B. Adaptive maintenance
C. Perfective maintenance
D. Preventive maintenance