（）is the most flexible mode of all the transport modes.
举一反三
- Among all the means of transport, _____ transport is the most flexible option for international business. A: air B: road C: sea D: rail
- Multimodal transport refers to a transport system usually （ ） under the control or ownership of one operator。 A: operated by one carrier with more than two modes of transport B: operated by one carrier with more than one mode of transport C: operated by several carriers with more than two modes of transport D: operated by several carriers with more than one mode of transport
- Which of the following working modes for slave clocks is the most accurate? A: Tracking synchronization mode B: Hold mode C: Free oscillation mode D: Clock output mode
- Rail transport is the most widely used mode of transportation in international trade.
- A transport hub is a place where passengers and cargo are exchanged between vehicles or between transport modes.