【单选题】下列常规制造方法中属于等量制造的是( )
【简答题】《规划建议》中有关绿色与发展的关系的论述与定位是绿色是永续发展的本质要求。判断对错
【单选题】The cooling water of diesel engine should be treated because the ___.
A.
cooling water is alkalescence
B.
cooling water has acidity
C.
cooling water has salinity
D.
cooling water has impurity
【单选题】下列有关人体器官结构的说法,错误的是( )。
B.
毛细血管是连通于最小动脉与最小静脉之间的血管
C.
心脏和血管中的瓣膜保证了人体血管中血液按一定方向流动
D.
肺泡壁和毛细血管壁都是一层扁平的上皮细胞,有利于肺泡与血液之间的气体交换
【单选题】Why the cooling water of the diesel engine should be treated? Because the ____.
A.
Cooling water is alkalescence
B.
cooling water is acidity
C.
cooling water has salinity
D.
cooling water has impurity
【单选题】Where is the cooling water from the compensating tank in the cooling water system of main engine lead to?
A.
discharge side of the centrifugal pump
B.
suction side of the centrifugal pump
C.
the lowest point of the cooling water system
D.
inlet of the main engine