单项选择。
It's very hot. Let's go .[ ]
A. swimming
B. swim
C. snow
答案:A
Nike is the name of ______ in Greek mythology. ( )
A.a heroine
B.the goddess of victory
C.the goddess of fortune
D.a wealthy lady
根据研究方法,一般可把生态学分为野外生态学、理论生态学和()。
A.实验生态学
B.种群生态学
C.行为生态学
D.草原生态学