题干
—Good morning, Dale!
—_________________
A：Good afternoon, Cindy!
B：Good evening, Cindy!
C：How are you, Cindy?
D：Good morning, Cindy!
答案(点此获取答案解析）
D
—Good morning, Dale!
—_________________
A：Good afternoon, Cindy!
B：Good evening, Cindy!
C：How are you, Cindy?
D：Good morning, Cindy!
群落演替。有关该群落演替的叙述，正确的是（ ）