当出现仪表显示不正确时,下列做法哪项不对()。
A、为保护工艺马上手动联锁停车
B、报告班长,一起查曲线分析原因
C、联系仪表保运人员处理
D、联系外操现场检查确认原因
参考答案:A
Since Jonas Salk came up with his polio vaccine, infantile paralysis has virtually disappeared from the United States.
A.surfaced with
B.raised the price of
C.discovered
D.elevated
()是百日咳鲍特菌的唯一感染宿主。