两带轮的基准直径之差越大,则小带轮包角α1也越大。( )
参考答案:错
------Which of the two computer games did you prefer?
------Actually I didn’t like________.
A.both of them
B.either of them
C.none of them
D.neither of them
制度创新与技术创新的结合进一步催生了()为代表的更为广阔而深远的创新理论体系。
A.科技创新系统
B.国家创新体系
C.社会创新体系
D.技术创新系统