听材料,回答105题
听材料,回答90题
The author says that he is a naturalist rather than a scientist probably because he thinks he______.
A.has a great deal of trouble doing mental arithmetic
B.just reads about other people's observations and discoveries
C.comes up with solutions in a most natural way
D.lacks some of the qualities required of a scientist
听材料,回答88题
根据材料,回答96题