观察植物细胞有丝分裂较好的材料是[ ]
A．洋葱表皮细胞
B．茎表皮
C．根尖尖端部分
D．叶肉细胞
答案：C
客户个人信息包括什么内容？
Jay Chow's __________ is so beautiful that most young people like his songs. [ ]
A. sound
B. whisper
C. noise
D. voice
