By doing the "tank test", the engineers can find out()
A: the amount of air in the plane
B: the strength of the plane structure
C: the pressure inside and outside the plane
D: the power of the airplane engines
A: the amount of air in the plane
B: the strength of the plane structure
C: the pressure inside and outside the plane
D: the power of the airplane engines
举一反三
- 2. On the plane, which members of crew can talk to each other? Can they communicate with anyone outside the plane?
- “Board the plane” means _________. A: go out of the plane B: leave the plane C: enter the plane D: run away
- If you took a plane to a place, you went there ________. A: on plane B: through plane C: by air D: in sky
- As mentioned in the last paragraph，a wind tunnel can be used to find out____. A: how fast a plane can rise B: how smooth a plane’s surface is C: how a plane lands in a strong wind D: how a plane drops at a low height
- “Board the plane” means _________ A: go out of the plane B: leave the plane C: enter the plane D: run away from the plane. E: C