An aircraft that encounters a headwind of 45knots, within a microburst, may expect a total shear across the microburst of（ ）.
A.40 knots
B.80 knots
C.90 knots
正确答案是C
An aircraft that encounters a headwind of 45knots, within a microburst, may expect a total shear across the microburst of（ ）.
A.40 knots
B.80 knots
C.90 knots
正确答案是C