—_____________________
A：First
B：Fifteen
C：Fifth
把5.5千克、5.5吨、5.05吨、5000千克按从大到小排列，排在第二位的数是（ ）
根据材料内容，选择最佳答案。
Name
Personal Information
Fei Junlong
Born in 1965 in Jiangsu, China
An astronaut (宇航员)
Traveled in Shenzhou VI in outer space with Nie Haisheng from October 12th to October 17th, 2005
Yao Ming
Born in 1980 in Shanghai, China
The son of two great basketball players
Joined the Houston Rockets in June, 2002
Jay Chou
Born in 1979 in Taiwan, China
A popular singer
Favorite music: Hip-Hop
Alfred Nobel (1833-1896)
Born in Sweden
A scientist
Known for the Nobel Prizes
Helen Keller (1880-1968)
Not able to see or hear
Worked hard and became one of the famous writers in America
Wrote a lot, such as The Story of My Life
香港、澳门的回归是“一国两制”伟大构想的成功实践，极大地推动了祖国统一的进程。2017年7月1日是香港回归多少周年（ ）
印度迅速发展的产业是( )
