承压类特种设备用钢中,按钢中所含化学成分可以将钢分成( )。A:碳素钢B:合金钢C:平炉钢D:电炉钢E:铁素体钢

作者: rantiku 人气: - 评论: 0
问题 承压类特种设备用钢中,按钢中所含化学成分可以将钢分成( )。
选项 A:碳素钢 B:合金钢 C:平炉钢 D:电炉钢 E:铁素体钢
答案 AB
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.'; ?>