吸烟者冠心病归因危险度为（）
A.1.4
B.153/105/年
C.23.7
D.177/105/年
E.0.7
参考答案：D
Yuan Longping ____ an idea for a hybrid rice in the 1960s.[ ]
A. caught up with
B. fell behind
C. came up with
D. put up with
《满江红》是音乐史家杨荫浏先生将（）的古曲与岳飞的《满江红》词配在一起的。
A.宋代
B.元代
C.明朝
D.清朝
idea for a hybrid rice in the 1960s.[ ]