餐具使用蒸汽消毒时，蒸汽温度不能低于95℃，消毒时间不可少于（）。
A. 5min
B. 10min
C. 15min
D. 30min
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在机构设置方面，我国银行主要的转变顺序是（）。
A. 从部门银行到流程银行
B. 从部门银行到行业银行
C. 从部门银行到过程银行
D. 从部门银行到战略银行
铬化合物中六价Cr毒性最大，有强刺激性，引起蛋白变性，干扰酶系统。
A. 正确
B. 错误
Which of these statements best describes VPLS？（）
A. Neither broadcast nor multicast traffic is ever flooded in VPL
B. Multicast traffic is flooded but broadcast traffic is not flooded in VPL
C. VPLS emulates an Ethernet switch， with each EMS being analogous to a VLA
D. Because U-PE devices act as IEEE 802.1 devices， the VPLS core must use ST
E. When the provider experiences an outage， IP re-routing restores PW connectivity and MAC re-learning is needed.
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