肿瘤的恶性程度高低决定于
A．肿瘤的发生部位B．肿瘤的肉眼形态改变C．肿瘤细胞的分化程度D．肿瘤的生长速度E．肿瘤的大小
参考答案：C
Liu Xiang _____ by his coach to train regularly. [ ]
A. advised
B. advises
C. was advised
D. be advised
实证主义观点
