What does the word infamous mean？A．not famousB．well known for something badC．well known fo

What does the underlined word“collapsed” probably mean？ （)A． Were destroyedB． Caught fire

What does the word precursor in the context in the second paragraph mean？

What does the word "defensive" mean in the passage？ 查

What does the word "integration" in the last paragraph probably mean？A．Host countries coop

What does the word“bottlenecks”(Para.2)mean in th

What does the word“defensive”mean in the passage?