TOEFL Reading: ETS-TOEFL阅读机经 - 19V319MB531KOT87L$

Paragraph 2 implies which of the following about tree flowering in seasonal rainforests A. It is less predictable than tree flowering in tropical rain forests B. It results from an unknown means of communication between the individual trees of each species. C. It is more useful to researchers trying to identify tree species than is the tree flowering in tropical rain forests. D. It follows the same pattern that tree flowering follows in a tropical secondary forest.