【多选题】活塞裙部膨胀槽一般开在 的一面,活塞裙部常温下横截面呈 形。
【单选题】When crossing a front, isobars tend to ____.
A.
change from smooth curves within the air mass to sharp bends at the front
B.
change from sharp bends within the air mass to smooth curves at the front
C.
pass smoothly across the front with no change
D.
become closer together at the front and pass through in straight lines
【判断题】活塞裙部膨胀槽一般开在受侧压力大的一面。( )
【单选题】--How do you like the plan put forward by Mr.Smith? --- Considering its real _____ , it will be worth having a try.
【判断题】活塞裙部膨胀槽一般开在侧压力较大的一面。( )