How many cities
will have air quality monitoring systems installed by the end of this
year?()
A: 42 cities.
B: 220 cities.
C: 150 cities.
D: 262 cities.
will have air quality monitoring systems installed by the end of this
year?()
A: 42 cities.
B: 220 cities.
C: 150 cities.
D: 262 cities.
举一反三
- Many Americans want to have their homes outside the cities and their jobs in the cities.
- Why are Boston and Chicago mentioned A: To demonstrate the development of big cities. B: To exemplify cities with and without mass transportation C: To show mass transportation changed many cities. D: To contrast their rate of growth and development.
- Please identify the cause in each of the following situation. In recent decades, many people have poured into the cities and the cities have grown so large that now about 50% of the Earth's population lives in urban areas. A: The cities have grown so large. B: Many people have poured into the cities. C: Now about 50% of the Earth's population lives in urban areas. D: None of them.
- Please identify the casue and effect of the problem in the following situation.In recent decades, many people have poured into the cities and the cities have grown so large that now about 50% of the Earth's population lives in urban areas. A: The problem is "The cities have grown so large." B: The cause is "Many people have poured into the cities." C: The effect is "Now about 50% of the Earth's population lives in urban areas." D: None of them
- Why does the author mention both Boston and Chicago A: To demonstrate positive and negative effects of growth. B: To show that mass transit changed many cities. C: To exemplify cities with and without mass transportation. D: To contrast their rates of growth.