Watson和Crick提出的双螺旋结构称为()。
A.A-DNA
B.B-DNA
C.C-DNA
D.D-DNA
E.Z-DNA
参考答案:B
系统地介绍马克思的唯物史观、剩余价值学说和阶级斗争理论,并被称为中国第一个马克思主义者的革命者是
A.陈独秀
B.毛 * *
C.李大钊
D.蔡和森
_____ I'll be in ten more years. [ ]
A. What do you think
B. Do you think what
C. When do you think
D. Do you think when