Our teachers often tell us to help _______ when they are _______. [ ]

A. another, trouble

B. others, in trouble

C. other, trouble

D. the others, in trouble

实性癌的组织学表现是

A．癌细胞团中央可见角化珠
B．癌细胞团漂浮在粘液内
C．粘液将癌细胞核推向一侧
D．癌细胞呈条索状排列