He will _______ his uncle’s business when he is mature(成熟的) enough to deal with the public relations.

A．hand over

B．take over

C．think over

D．go over

妊娠时患巨幼红细胞性贫血的原因除外

A．妊娠期叶酸需要量增加

B．妊娠期叶酸吸收减少

C．妊娠期叶酸排泄增加

D．妊娠期维生素B12体内储藏量少

E．由于一些原因引起维生素Bl2吸收减少