（）is the disadvantage for air transportation?

[单选题]What is the disadvantage for air transportation? （）A . Quick but not safeB . Less frequencyC . It can’t lift heavy goodsD . The highest cost in all transport modes

[名词解释] 不利因子 disadvantage factor

[单选题]The disadvantage above mentioned can be overcome by （）A . combined transportB . More frequencyC . Fast trainD . More flexible

[单选题]The main disadvantage is（）in global logistics.A . unqualified productsB . Different languagesC . Transportation delayedD . Unreliable delivery of goods

[单选题]One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.A . the extra weight required for the diesel reduction gearingB . a minimum speed for the engines that limits the minimum speed of the vesselC . the highe

[单选题]Compressed air is supplied by air compression to （）.A . the air receiversB . the starting valvesC . the cylinder coversD . the distributor

[单选题]The most direct disadvantage of investing in a callable security relative t

[单选题]Air cargo is （）A . air transportB . air freightC . air deliveryD . plane

[单选题]An air waybill is （ ）.A.flexibleB.negotiableC.non-negotiableD.transferable

[单选题]An air waybill is （ ）.A.flexibleB.negotiableC.non-negotiableD.transferable