About half an hour before the engine is required, cooling water at () must be circulated.
A. more than the working temperature
B. less than the working temperature
C. the working temperature
D. the same as the surrounding temperature
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隐身技术是为隐蔽自己和欺骗、迷惑敌方所采取的各种隐真示假的技术。
A. 正确
B. 错误
下列不属于心理障碍特点的是()
A. 常常有偏离常态的行为,行为异于大多数人
B. 心理的完整功能遭到破坏,导致个体社会适应困难
C. 所有心理障碍者都会感到精神痛苦,并积极求医
D. 心理障碍者严重地损伤了个人对环境的适应能力