【单选题】What can't be done by a driverless delivery vehicle?
C.
Avoid barriers on roads.
D.
Send messages to tell the customers.
【判断题】电网频率是50Hz时,一个交流异步电动机的转速可达到1500r/min。
【单选题】If an entity purchases a new delivery vehicle it doesn’t make sense to expense the full cost of the vehicle at the time it is purchased because
A.
it will be used for many subsequent periods
B.
profit will be too low
C.
vehicles wear out over time and it will be worth less each period
【判断题】商业银行转型应当实施“铺网点地推式”发展模式