果汁、柳橙、橘子对切成两半后压汁,喂食前加入()的冷开水稀释。
A. 一倍
B. 两倍
C. 半量
D. 等量
增加轴承的比压。可以增加轴承载荷,缩短轴瓦长度可防止机组发生油膜振荡。()
A. 正确
B. 错误
“通报”往往运用“决定”的形式来表达上级机关的意见,下列没有决定部分的通报是()。
A. 表彰性通报
B. 批评性通报
C. 传达性通报
D. 发布性通报
Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?()
A. Maintains a constant head on the system
B. Reduces the likelihood of air or steam pockets formation
C. Provides a low pressure point for the addition of makeup cooling water
D. All of the above