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【多选题】
What are the features of the taxi service in Japan based on the description in paragraph 3-4?A.
The taxi driver is passionate.
B.
The taxi driver opens the door for the traveller automatically.
C.
The taxi drive will refuse to take the traveller even if he does not know how to go to the destination.
D.
The taxi drive will not refuse to take the traveller even if he does not know how to go to the destination.
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举一反三
【单选题】直流调速系统存在缺点,说法错误的是:( )
A.
直流电动机结构复杂，成本高，故障多，维修困难
B.
易燃易爆易腐蚀等恶劣环境下不适用
C.
换向器的换向能力限制了单机的容量和转速
D.
直流电机体积、重量、价格比高，且结构简单、经济可靠、惯性小