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.
选项:
A: The effect is "Now about 50% of the Earth's population lives in urban areas.";
B:The cause is "Many people have poured into the cities.";
C:The problem is "The cities have grown so large.";
D:None of them
发布时间:2024-04-07 23:13:46