良性肿瘤的异型性表现为：（）
A．瘤细胞多形性
B．瘤细胞核的多形性
C．瘤实质及间质排列紊乱
D．病理性核分裂
E．核浆比例异常增大
参考答案：C
我国地貌最低的地方是( )。
A．准格尔盆地B．吐鲁番盆地C．艾丁湖湖面D．青海湖湖面
A flooded lifeboat on board a vessel would adversely affect the vessel’s stability by（）.
A.increasing the righting moment
B.decreasing the vessel's displacement
C.increasing the reserve buoyancy
D.shifting the CG (center of gravity) off center
