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【多选题】
新中国国防建设取得的主要成就表现在( )A.
造有利于国家和平发展的安全环境
B.
造了一支现代水平并向信息化迈进的强大军队
C.
立了比较完善的国防动员体制
D.
成了门类齐全、综合配套的国防科技工业体系
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皮皮学刷刷变学霸
举一反三
【单选题】A solenoid valve used in a refrigeration system should be installed （）.
A.
with the axis of the solenoid horizontal, sensing temperature of the box, and upstream of the thermal expansion valve
B.
upright, sensing temperature of the box, and upstream of the thermal expansion valve
C.
upright, sensing temperature of the box, and downstream of the thermal expansion valve
D.
upright, sensing heat of the tail coil, and upstream of the thermal expansion valve
【简答题】指令( )用于取消宏定义
【单选题】In a starting circuit containing a solenoid, when is battery current supplied to the starter motor?
A.
When the remote control switch is closed
B.
At the time the ignition switch is turned to the start position
C.
After the starter pinion is engaged with the flywheel
D.
When the plunger closes the contacts in the solenoid
【简答题】starter solenoid____________________
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