块根是由（）或不定根膨大发育而成。
A、主根
B、侧根
C、须根
D、定根
参考答案：B
Mr.Su is on his way to power with constant election __________ around the streets in Taipei.[ ]
A．battles
B．campaigns
C．wars
D．fights
骨巨细胞瘤治疗方案的确定，决定于()
A．X线表现
B．临床表现
C．病理检查
D．G、T、M分级
E．放疗后是否恶变
