My wife has three brothers, all are ___ than she.____ George is an officer.

A．elder, The eldest

B．old, The eldest

C．elder, The old one

D．older, The eldest

小儿初次感染结核杆菌至产生变态反应的时间是()

A．48～72小时

B．2～3周

C．4～8周

D．10～12周

E．2～3月