在SF6配电装置室低位区,()是错误的。
A. 应安装能报警的氧量仪
B. 安装SF气体泄漏警报仪
C. 门外和室内通道按需装设报警仪显示器
D. 有关仪器应定期检验,确保完好
从长期盈利来看,除美元外下列哪种资产给投资者带来贬值效应()。
A. 股票
B. 黄金
C. 债券
D. 国库券
Yourradardisplaysyourshipoffcenter.Asyouproceedonyourcourse,yourship’smarkermovesonthePPIscopewhileechoesfromlandmassesremainstationary.Whatisthisdisplaycalled().
A. Offcenter
B. Truemotion
C. Stabilized
D. Headup
Yourradarissetonatruemotiondisplay.WhichofthefollowingwillNOTappeartomoveacrossthePPIscope().
A. Echoesfromabuoy
B. Ownship'smarker
C. Echofromashiponthesamecourseatthesamespeed
D. Echofromashiponareciprocalcourseatthesamespeed