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【单选题】
*在北半球,若船舶误入热带气旋左半圆涡旋区,应使________,全速驶离。A.
船尾30~40°受风
B.
右舷船尾30~40°受风
C.
船首10°~45°受风
D.
右舷船首10°~45°受风
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反馈参考答案：
举一反三
【单选题】更换电池之前,先接通可编程序控制器的交流电源约 ( )S ,为存储器备用电源的 电容器充电(电池断开后,该电容器对存储器做短暂供电)。
A.
3
B.
5
C.
10
D.
1
【单选题】Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?
A.
Height of the machine
B.
Temperature of the liquid seal
C.
Gravity disc
D.
Bowl diameter
【单选题】In the oil purifier, the interface move outside the top disc, the oil will escape through______.
A.
the sludge passage
B.
the sludge outlet
C.
the observe glass passage
D.
the water outlet
【单选题】In the oil purifier, the interface move outside the top disc, the oil will escape through______
A.
the observe glass passage
B.
the sludge outlet
C.
the water outlet
D.
the sludge passage
【单选题】In a disk-type lubricating oil purifier, _______.
A.
the purifier driving gears are lubricated by the reclaimed
B.
oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling water
C.
sealing water must never be supplied until after oil is fed to the unit
D.
deterioration of the bowl ring gasket will cause the purifier to lose its water seal
【简答题】制药工程项目从设想到交付生产整个过程可分为 、 和 。
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