I was born ______. [ ]
A. on May
B. in 1993
C. in May 11th
D. in Saturday morning
答案:B
DNA的一个单链中(A+G)/(T+C)=0.2,上边比例在其互补链和整个DNA分子中分别是 [ ]
A.0.4和0.6
B.5和1.0
C.0.4和0.4
D.0.6和1.0
狐步舞的风格特点除了具有华尔兹的典雅大方、舒展流畅和轻盈飘逸之外,更具有狐步舞独有的平稳大方,悠闲恬恬的韵味。音乐节奏为()拍。
A.1/4
B.2/4
C.3/4
D.4/4