【简答题】Write two sentences for each place. Use near, across from,next to, in front of, behind, or between. Where is your house?
【简答题】Please use some of the language patterns(which were provided in the lecture notes about writing skills) to write two sentences about the graph (Figure 1.3)
【单选题】下列哪一项正确地说明了气环二的作用?
A.
是一个备用压力环,当气环一损坏时,将接替气环一的工作。
C.
是一个备用机油控制环,当油环损坏时,将接替油环的工作。
【单选题】下列哪一项正确地说明了第二道气环的作用?
A.
是一个备用压力环,当第一道气环损坏时,将接替第一道气环的工作。
B.
是一个压力环,协助第一道气环进行密封和冷却。
C.
是一个备用机油控制环,当油环损坏时,将接替油环的工作。
【简答题】Write two sentences for each place. Use near, across from, next to, in front of, behind, or between. Where is your school?
【单选题】下列哪一项正确地说明了机油控制环的作用?
B.
通过将机油阻滞在其环槽中,以保持气缸壁的润滑效果。
C.
通过活塞内的回油孔将过多的润滑油返回到油底壳内。