A:30°
B:45°
C:50°
D:70°
2083____2803
898____889
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
分离氯化钾、氯化铜、碳酸钙的混合物,在不引入新杂质的条件下,可以依次加入的一组试剂是 ( )
在历史学习中,图片往往隐含着大量的有效信息.从右图“隋朝大运河”中我们可以得到的准确信息是( )
①它的中心是洛阳②它沟通了我国南北交通
③它促进了我国南北经济的交流④它有效抵御了北方游牧民族的进攻