My elder brother wants to buy a _____ computer, so that he can carry it around when he travels.

A．removable

B．portable

C．possible

D．readable

性发育和性成熟是青春期发育的特点之一，下列不属于青春期发育第二性征的是[ ]

A．男生长胡须

B．男生喉结突出

C．女生骨盆较宽大

D．女生长长发