单选题 The ______ of public transportation is a key feature of smart cities.

单选题 The concept of smart cities is gradually gaining more ____.

单选题 When an emergency occurs, the system can quickly ____ to the situation.

单选题 The development of smart cities is likely to ____ the living standards of residents.

单选题 When a fire breaks out, inhabitants can be instantly ____ via smartphones.

单选题 The government is investing heavily in the ____ of smart city infrastructure.

单选题 The traditional model of urbanization has led to a great deal of resource ____.

单选题 Smart cities make ____ use of interconnected information.

单选题 The traditional urbanization model has caused serious environmental problems due to its excessive ____ of fossil fuels.