A.只有别人点燃一盏灯,才能照亮我们自己
B.只有为别人点燃一盏灯,才能照亮我们自己
C.只有我们自己点燃一盏灯,才能照亮自己和他
D.只有别人为我们点燃一盏灯,才能照亮我们自己
A.examples of the separation of mechanics and geometry.
B.cases about the studies of lack of communication between classes.
C.obstacle to the progress of technology.
D.his concern about the plight of the labouring classes.
此题为判断题(对,错)。
Why does the author ask readers to recall "the fate of the Columbian white-tailed deer" in the discussion of changes in the wilderness landscape?
A.To provide support for the idea that habitat destruction would lead to population decline
B.To compare how two species of deer caused biotic changes in the wilderness environment
C.To provide an example of a species of deer that has successfully adapted to human settlement
D.To argue that some deer species must be given a protected status