安全*区Ⅰ/安全*区Ⅱ的重要业务（如SCADA、电力交易）应该采用认证加密机制。
参考答案：对
塑料基托的厚度一般为
A．0.5mmB．1.0mmC．2.5mmD．2.0mmE．3.0mm
His sudden ______ of violent anger put an unpleasant end to the meeting.
A．break
B．burst
C．attack
D．express
