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【单选题】
系统设计基于哪个阶段的基础进行A.
系统规划
B.
系统分析
C.
系统实施
D.
系统运行与维护
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举一反三
【简答题】We
have ten presents.
【单选题】What should the children do to ensure the possession of their sites?
A.
Frequently change their passwords of online accounts.
B.
Put their photos online frequently and randomly.
C.
Guarantee the decency of language on their sites.
D.
Use their real full name for their online account.
【单选题】What should the children do to ensure the possession of their sites?
A.
Frequently change their passwords of online accounts.
B.
Put their photos online frequently and randomly.
C.
Guarantee the decency of language on their sites.
D.
Use their read full name for their online account.
【简答题】世界上第一部彩色动画片是
【单选题】Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism．These correctors are the ______．
A.
Fore-and-aft and athwartships magnets
B.
Dip needle and heeling magnet
C.
Heeling magnet and Flinders bar
D.
Flinders bar and quadrantal spheres
【单选题】Vessels should be manned ________duly qualified offcers and crew adequate________ensure the safety of navigation.
A.
by/to
B.
with/to
C.
with/for
D.
from/for
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