建立岗位记事本，发现可疑情况，不论如何处理，都应有（）。
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根据计算机在控制中的应用方式，把计算机控制系统分为哪几类？
在“SetPG/PC”通讯属性时，COM口的符号前为什么会有一个星号“*”？
When a job exceeds the date specified in its END_DATE attribute, which of the following will happen?（）
A. The job will be dropped automatically if the value of the AUTO_DROP attribute is TRUE
B. The job will only be disabled if the value of the AUTO_DROP attribute is FALSE
C. The STATE attribute of the job will be set to COMPLETED if the value of the AUTO_DROP attribute is FALSE
D. All objects referenced by the job will be dropped if the value of the AUTO_DROP attribute is TRUE and the value of the CASCADE attribute is TRUE
E. The STATE column of the job table will be set to COMPLETED for the jo
钢在拉拔时几乎没有塑性变形就断裂的现象称之为（）
A. 脆性断裂（或脆断）
B. 冷脆
C. 热脆
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