The disadvantages of rail compared with motor carrier are（）
举一反三
- ( ) transport is used for large loads of low-value-per-unit goods. A: water B: air C: rail D: motor
- Passenger is to bus as () A: cargo is to ship B: pilot is to plane C: bicycle is to motorist D: motor is to boat E: freight is to rail
- The ( ) stepping motor is used widely in the industry. A: variable reluctance stepping motor B: hybird stepping motor C: permanent magnet stepping motor D: reluctance stepping motor
- The cost of the air fare is higher than ______. A: the rail fare B: that of the rail fare C: those of the rail fare D: which of the rail fare
- The type of stepping motor widely used in industry is A: reactive B: permanent manget motor C: hybird motor D: variable reluctance motor