基站机房内供电设备的正常不带电部分均应作保护接地,严禁作接零保护;直流工作地应从接地汇集线上就近引接,接地线截面积应满足最大负荷要求,一般为35~95mm2的多股铜线。直流工作地严禁从交流配电屏直接引接。
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You are designing a DNS infrastructure to meet the Internet name resolution requirements. What should you do?()
A. Create a standard primary zone named “.” on all DNS servers.
B. Create an Active Directory-integrated zone named “.” on a DNS server on Los Angeles.
Configure all DNS servers to use forwarders. Specify the IP address of the DNS server at the local IS
D. Enable default root hints on all DNS servers.
E. Disable recursion on all DNS servers.&e
当前我国主要的杀灭钉螺药物是()
A. 五氯酚钠
B. 蒿甲醚
C. 氯硝柳胺
D. 邻苯二甲酸二丁酯
E. 蒿琥酯
董某,男,47岁,渔民。自诉肢体关节疼痛,反复发作10余年,加重1个月。症见多关节疼痛,屈伸不利,关节肿大,梭状变形,晨起僵硬,四肢肌肉萎缩,肘膝屈伸不利,疼痛夜间痛甚,遇寒加重,舌紫暗,脉弦涩。其证型是()
A. 痛痹
B. 行痹
C. 着痹
D. 热痹
E. 尪痹