High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
查看答案
质量管理的目的是通过严格的控制和监督，使维护工作制度化、规范化和科学化，确保应急通信迅速、优质、安全、畅通.
A. 正确
B. 错误
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