抗生素治疗后多长时间对病情进行评价()
A.72~96小时
B.48~72/小时
C.两周后
D.一周后
E.12~24小时
参考答案:B
---Listen, Mum. I heard the footsteps. Is it Dad?
---It ___ be him. He’s gone to Beijing on business this morning.
A.can’t
B.mustn’t
C.needn’t
D.shouldn’t
如何做好工艺创新、新品种开发?