______, which are often called gums, are common in the highlands of the south and along the edges of the deserts.
A、Eucalyptus trees
B、Maple tree
C、Dahurian larch
D、Wattle
【正确答案】：A
【题目解析】：Eucalyptus trees, which are often called gums, are common in the highlands of the south and along the edges of the deserts. 参见教材P287.
