谷类、玉米如配以大豆可提高食物的生物价值。()
参考答案：对
— Have you taught English for a long time?
— Well, I have only been a teacher _____ 5 years ago. [ ]
A. for
B. after
C. since
卵巢子宫内膜异位症首选的诊断和治疗措施是
A．假绝经疗法B．囊肿穿刺C．假孕疗法D．腹腔镜E．开腹手术
