猪发情持续期为()天。
参考答案:2—3天
鼻窦中不包括()
A.额窦
B.蝶窦
C.筛窦
D.上颌窦
E.矢状窦
I think our teacher was too strict, but now I him.[ ]
A. used to, used to
B. am used to, am used to
C. used to, am used to
D. am used to, used to