单选题
发布日期:2021-03-22
Reduction of friction
Insulation of hot surfaces
Lubrication of moving parts
Elevation of cooler outlet temperatures
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列车进路有四个及其以上发车方向,进路表示器按灯光排列表示,信号机在开放状态及表示器左方斜向显示两个白色灯光,表示进路开通,准许列车向()线路发车。
工艺流程图中热水管线应该涂()。
()不受到著作权法的保护。
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将十进制数40转换成二进制数为:()
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患者,男,30岁。十二指肠溃疡史5年。今日突然呕血伴休克。应首先采取的抢救措施是()。
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