恶性肿瘤细胞的形态特点是()
A．细胞多形性明显
B．核浆比例增大
C．核深染、核仁肥大
D．胞浆嗜酸性
E．出现病理核分裂
参考答案：A, B, C, E
______ he realized it was too late to retum home. [ ]
A. No sooner it grew dark than
B. Hardly did it grow dark when
C. It was not until dark that
D. It was until dark that
光缆敷设在坡度大于（），坡长大于（）斜坡地段宜采用S形敷设。
A.30°，20米
B.20°，30米
C.60°，30米
D.45°，20米
