In a diesel engine jacket water cooler, with seawater cooling the fresh water, the()
A. sea water temperature must never be warmer than 40℃
B. jacket water pressure should always be greater than the sea water pressure
C. jacket water temperature must always be less than 60℃
D. jacket water pressure must always be less than the sea water pressure
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对于旅游贷款借款人同时申请贷款笔数超过()笔的,原则上应采用授信额度方式。
A. 2
B. 3
C. 6
D. 8
微机高频保护接成高频允许式和高频闭锁式,在正常运行时,高频通道是否有信号?
质量管理体系、环境管理体系和HSE管理体系所依据的模式是什么?它由哪几个阶段组成?
镀多层镍是在同一基体上,选用不同的镀液成分及工艺条件,获得两层或三层的镍镀层。
A. 正确
B. 错误