经腹输卵管结扎术后
A.禁性生活3个月B.禁性生活6周C.禁性生活1个月D.禁性生活2周E.禁性生活
参考答案:C
解析: 经腹输卵管结扎术后禁性生活1个月。
He has read many books on science, so it's easy for him _____ these questions.[ ]
A. answers
B. to answer
C. answering
D. answer
种子生产、经营许可证由市或者区、县种子管理机构核发,但从事进、出口业务的由国务院林业行政主管部门核发,有效期为三年。()