泵运行中如发现供水压力低,流量下降,管道振动,泵窜轴,则为()。
A. 不上水
B. 出水量不足
C. 水泵汽化
D. 管道内有异物
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肌肉本身疾病()锥体外系损害,伸肌屈肌张力增高程度相等()锥体束损害()
A. 肌张力减低,肌肉松弛
B. 折刀式肌张力升高
C. 齿轮样僵直
D. 铅管样僵直
E. 四肢肌肉收缩后不易放松
细分成品油市场的依据和标准通常有地理因素、人口因素、()、()。
What are two key characteristics of VTP? ()
A. VTP messages are sent out all switch-switch connections.
B. VTP L2 messages are communicated to neighbors using CD
C. VTP manages addition, deletion, and renaming of VLANs 1 to 4094.
D. VTP pruning restricts flooded traffic, increasing available bandwidth.
E. VTP V2 can only be used in a domain consisting of V2 capable switches.
F. VTP V2 performs consistency checks on all sources of VLAN information.