特殊检查分为()和(),特殊检查应委托有相应资质和能力的单位承担。
参考答案:专门检查;应急检查
Which of the following statements is NOT true of "free flight"
A.Commercial aircraft is guided by GPS.
B.Civilian aircraft are free to move over all territories.
C.Cargo carriers no longer collide with one another.
D.Passenger flights are safe to fly with military aircrafts.
A.该工业基地矿产丰富,钢铁等工业发达
B.A河水量丰富,但冬季有漫长的结冰期,对航运产生不利影响
C.B是天津市,是该地区重要的交通枢纽
D.铁路①是京沪线,是我国重要的铁路干线