我国制成的猪细小病毒灭活疫苗,在初产母猪配种前(?)左右注射一次,可预防本病的发生。A.10天B.1个月C.20天D.45天E.3天

作者: rantiku 人气: - 评论: 0
问题 我国制成的猪细小病毒灭活疫苗,在初产母猪配种前(?)左右注射一次,可预防本病的发生。
选项 A.10天 B.1个月 C.20天 D.45天 E.3天
答案 B
解析

猜你喜欢

发表评论
更多 网友评论0 条评论)
暂无评论
错误啦!

错误信息

  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
    <?php echo 'KongPHP, Road to Jane.'; ?>