【单选题】Ecologists have studied the four chipmunk species that occur on the eastern slope of the Sierra and have learned just how these species interact while remaining separate, each occupying its own elevat...
A.
Ecologists studied how the geographic characteristics of the eastern slope of the Sierra influenced the social development of chipmunks.
B.
Ecologists learned exactly how chipmunk species separated from each other on the eastern slope of the Sierra relate to one another.
C.
Ecologists discovered that chipmunks of the eastern slope of the Sierra invade and occupy higher elevational zones when threatened by another species.
D.
Ecologists studied how individual chipmunks of the eastern slope of the Sierra avoid interacting with others of their species.
【简答题】该比例在所有核国家中居第 30 位,几乎是最低的。 That ’ s almost the lowest percentage , ____________________________. 解析: 译文将 “ 几乎是最低的 ” 放在了前面先译,然后再用 “ranking 30th among all nuclear powers” 交待具体的名次。
【简答题】Crime rates in the United States have been 1.____________ for a number of years. Rates of violent crime have fallen to their lowest levels since the 1970s. President Bush 2. ____________ this in his d...