下列哪一项不符合肿瘤性成长
A．生长旺盛
B．细胞分化成熟能力降低
C．常形成肿块
D．增生过程中需致癌因素持续存在
E．相对无止境成长
参考答案：D
The police _____ the murderer everywhere when he suddenly appeared in a theatre. [ ]
A. is searching for
B. were searching for
C. are searching for
D. were searching
标准砝码检定室的湿度，应保持在（）
A、20%～50%
B、30%～50%
C、50%～70%
D、50%～90%
