You must attend the meeting ____ at ten o’clock, as it is scheduled—not a minute early or late．

A．accurately

B．punctually

C．flexibly

D．approximately

良性与恶性肿瘤判定中，最有诊断意义的是（）

A．生长方式

B．生长速度

C．肿瘤的异型性

D．对机体影响

E．癌巢