充满了择善固执、历久弥坚、不断奋进的精神光辉的诗作是()。
A.《相信未来》
B.《山民》
C.《岁月》
D.《我》
参考答案:A
I'm not familiar with this place. It's the first time I _____ here, you know. [ ]
A. am
B. was
C. have been
D. had been
动物细胞不同于植物细胞的特点是(),(),(),()。