北京属于____________气候，冬夏长，春秋短；北京市的地势_________高、_________低。
温带大陆性季风；西北；东南
The young dancers looked so charming in their beautiful clothes that we took__________ pictures of
them. [ ]
A. many of
B. a great many
C. the number of
D. a large amount of
科研人员道德最基本的行为规范是指（）
A.奉献精神
B.学术精神
C.爱国主义
D.全心全意为人民服务
