The phenomenon of flutter occurs:
A: Rather at low speed and low altitude.
B: Rather at high altitude and high angle of attack.
C: Rather at high speed.
D: Rather transonic, beyond the critical Mach.
A: Rather at low speed and low altitude.
B: Rather at high altitude and high angle of attack.
C: Rather at high speed.
D: Rather transonic, beyond the critical Mach.
举一反三
- The tuition in a private college is _____. A: high B: rather high C: quite low D: tolerable
- The computer works with high calculating speed, high stability and low consumption.
- Limit pricing requires the monopolist to maintain a low price before entry occurs ( ). A: high, after B: high, before C: low, before D: low, after
- There is the apparent paradox ( ) the effective cause of the high proportion of the old is births rather than deaths.
- The aphotic zone (bottom of the ocean) will have ____ and ____ while the photic zone (surface of the ocean) will have ____ and ____. A: low temperature, low salinity; high temperature, high salinity B: low temperature, high salinity; high temperature, low salinity C: high temperature, high salinity; low temperature, low salinity D: high temperature, low salinity; low temperature, high salinity E: both have equal temperature and salinity