生境片断化
参考答案：
指一个面积较大的连续的生境变成很多面积叫徐的小斑块，而斑块指尖被与过去不同的背景基质所隔离。
．—Do you think_____ worthwhile to go all the way to Los Angles to buy that computer?
—Well ,I’m going to visit some relatives, too.
A．it
B．/
C．this
D．that
—What do you think of the book A Haw Tree written by a woman writer?
—It reminds me of the days _____ I spent in the countryside.[ ]
A. when
B. that
C. who
D. where
