建设创新型国家,核心是把增强()能力作为我国科学技术发展的战略基点.
A.实践
B.创造
C.自主创新
D.发展经济
参考答案:C
鸡的毛腿(B)对光腿(b)为显性.现让毛腿雌鸡甲、乙分别与光腿雄鸡丙交配,甲的后代有毛腿,也有光腿,比为1:1,乙的后代全部是毛腿,则甲、乙、丙的基因型依次是[ ]
A.BB、Bb、bb
B.bb、Bb、BB
C.Bb、BB、bb
D.Bb、bb、BB
Your performance in the diving test didn't reach the required standard - ______, you failed. [ ]
A. in the end
B. after all
C. in other words
D. at the same time