第一大題單選(60%) Section I:        Plant communities assemble themselves flexibly, and their particular structure depends on the specific history of the area.Ecologists use the term "succession" to refer to the changes that happen in plant communities and ecosystems over time. The firstcommunity in a succession is called a pioneer community, while the long-lived community at the end of succession is called aclimax community. Pioneer and successional plant communities are said to change over periods from 1 to 5o0 years. Thesechanges-in plant numbers and the mix of species-are cumulative. Climax communities themselves change but over periods oftime greater than about 500 years.        An ecologist who studies a pond today may well find it relatively unchanged in a year's time. Individual fish may be replaced,but the number of fish will tend to be the same from one year to the next. We can say that the properties of an ecosystem aremore stable than the individual organisms that compose the ecosystem.
【題組】1. The word "particular" in the passage is closest in meaning to
(A)Natural
(B)Final
(C)Specific
(D)Complex