答:至少需要铁皮1884平方厘米。
20世纪初,中国第一个全国规模的资产阶级革命政党是( )
⑴I'm hungry.____ A. She's running.
⑵What are you doing?____ B. He's making noodles.
⑶What are they doing?____ C. I'm hungry, too.
⑷What is she doing?____ D. They are rowing a boat.
⑸What is Sam doing?____ E. I'm reading a book.
黄河中游水土流失严重,泥沙淤积使河床逐渐抬升,最终形成“地上河”。 ( )