在以经济效益为中心、安全文明生产为基础的经营承包过程中主要的考核指标是（）指标。
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防静电接地线应与设备、机组、储罐等固定接地端子或螺栓连接，连接螺栓不应小于（）。
A. M4
B. M6
C. M8
D. M10
Which two differentiators make RSTP the preferred protocol for preventing Layer 2 loops in a switchednetwork environment?（） (Choose two.)
A. Features such as UplinkFast and BackboneFast are compatible with RST
B. An RSTP that is based on Cisco products generally performs better than the Cisco proprietary 802.1D enhancements.
Cisco proprietary enhancements are not transparent.
D. Information about port roles is sent to all switches.
E. RSTPs that are based on Cisco products require no additional configuration.
深槽笼形异步电动机的特点是启动转矩大，启动电流小，过载能力强。（
A. 正确
B. 错误
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