下列不属于生物的多样性的是[ ]
A.生态系统的多样性
B.生物数量的多样性
C.基因的多样性
D.生物种类的多样性
答案:B
When she realized I _______ her, she quickly made a pose, smiling.
A.photographed
B.had photographed
C.was photographing
D.will photograph
百团大战的指挥者是[ ]
A.叶挺
B.朱德
C.彭德怀
D.贺龙