John Milton’s greatest poetical work ________ is the only generally acknowledged epic in English literature since Beowulf.

A．Areopagitica

B．Paradise Lost

C．Lycidas

D．Samson Agonistes

地方性甲状腺功能减低症的原因是（）

A.孕妇血液中有抗体

B.孕妇患甲亢

C.孕妇饮食中缺碘

D.孕妇早期病毒感染

E.孕妇服用甲状腺素