Nanjing Harbor, with an annual capacity of 20 million tons, is China's largest river harbor.()
Chinese cuisine is the best in the world.()
Resort hotels are usually located in the business section of the town.()
供热与供冷系统的最低保修期限为()。
A. 2年
B. 3年
C. 2个采暖期、供冷期
D. 1个采暖期、供冷期
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