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知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。
可能我没有表述清楚，在初中阶段学习了简单句的六种基本句型1. s v2. s v o3. s v io do4.
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- Pittsburgh
City and county seat in Allegheny County, Pennsylvania, United States
Pittsburgh is a city in and the county seat of Allegheny County, Pennsylvania, United States. It is the second-most populous city in Pennsylvania, after Philadelphia, and the 68th-most populous city in the U.S., with a population of 302,971 as of the 2020 census. Wikipedia
- Cloudy 65°F/18°C
- 7:13 PM EDT, Tuesday
- Allegheny County, Pennsylvania
- 302,971
- 373 m
- John Forbes (British Army officer)
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