【单选题】The locking device of the nose wheel must always be ____ when an aircraft is towed.
【多选题】振动式压路机按振动压路机自身重量的不同,可分为()。
【单选题】下列项目中属于预算定额中人工工日消耗量中辅助用工的是( )。
【多选题】When an aircraft is too close to the preceding one in the aerodrome traffic circuit which following methods may be taken by ATC?
C.
Follow ATC instruction
【单选题】词汇与结构 When an aircraft is designed, it is made as ______ as the required structural strength will allow.
【单选题】含水量较大的黏性土最适合的压实机械为( )。
【单选题】下列项目中属于预算定额中人工工日消耗量中人工幅度差的是( )。
【单选题】含水量较大黏性土最适合的压实机械为( )。
【单选题】含水量较大的粘性土最适合的压实机械为( )。