恐龙突然灭绝的时期距今约()万年。
A.5000
B.6000
C.6500
D.7000
参考答案:C
She strongly objected______my mother’s marriage. Surprisingly, my mother’s reaction _____it was rather calm .
A.to; to
B.to; with
C.against; against
D.to; on
企业在安全生产许可证有效期内,严格遵守有关安全生产的法律法规,未发生死亡事故的,安全生产许可证有效期届满时,经原安全生产许可证颁发管理机关同意,不再审查,安全生产许可证有效期延期( )年。
A.1
B.2
C.3
D.5