如果温度变送器出现温度示值偏低或不稳故障现象时可能的原因是什么？处理方法？
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What action should you be prepared to take when verifying a security solution？（）
A. having alternative addressing and VLAN schemes
B. having a rollback plan in case of unwanted or unexpected results
C. running a test script against all possible security threats to insure that the solution will mitigate all potential threats
D. isolating and testing each security domain individually to insure that the security design will meet overall requirements when placed into production as an entire system
当持卡人持有两张（含）以上的金穗贷记卡（个人卡主卡），其总信用额度为（）。
A. 每张金穗贷记卡的信用额度之和
B. 其中最高的一个信用额度为持卡人的总信用额度
C. 任意张贷记卡的信用额度
D. 持卡人自己设置
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