Which city is the transportation core of the USA?啥意思

Which city is the capital of france which city is the capital of thailand? which is the capital city of Australia? which city is called the city of water Which city is callde the city of fog? which city is in the north of city? The CN Tower is the symbol of the city of toronto,which is a city of[ ] Which is the capital city of the USA? 翻译：Which part of the country is the city in which country is the homeland the city of Which of the following is called the City of Music? Which city is the transportation core of the USA?回答 ( ) city is the capital of USA 填 Which 还是What Which city is the capital of france?翻译 Which is the largest city in China怎么回答 which south American capital city is the highest?怎么翻译? 帮帮忙Which is the ___(three) biggest city in China? which city is the most beautiful in south China?