After the first observation and issuing of SNOWTAM, if the snowfall continues or runway ices over, observation should be made every _______hour(s), and new SNOWTAMs should be issued until all flights are finished.
A.1.5
B.1
C.2
D.0.5
正确答案是B
After the first observation and issuing of SNOWTAM, if the snowfall continues or runway ices over, observation should be made every _______hour(s), and new SNOWTAMs should be issued until all flights are finished.
A.1.5
B.1
C.2
D.0.5
正确答案是B