题目

Since 2000, the Feather River Land Trust (FRLT) has been working to protect the lands and waters of the Feather River region. FRLT owns three very special places, which we invite you to visit. Maddalena Property in Sierra Valley. Maddalena Property is a heaven for people who like birds. Its wetlands have more than 120 bird species. With increasing numbers of visitors every year, Maddalena Property has become the place that bird lovers must visit. Open to the public all year round, Maddalena Property is a great place for you to play in the wetlands, and enjoy great 360-degree views of the下列结构或物质中不含核糖分子的是A．m RNA B．腺苷 C．HIV D．T2噬菌体