单选题During inspection of the machinery space, which of the following statements points to an unsatisfactory organization of the systematic maintenance?（）Amissing valve hand wheelsBdirty tank topsCa large number of temporary repairsDAll of the above
单选题
During inspection of the machinery space, which of the following statements points to an unsatisfactory organization of the systematic maintenance?（）
A
missing valve hand wheels
B
dirty tank tops
C
a large number of temporary repairs
D
All of the above
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