土袋子埝一般用()较好,而颗粒较粗或掺有砾石的土料也可以使用。
A、砂粘土料
B、粘性土料
C、壤土
D、淤土
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土塘划定应以节约运距、土料适宜和()为原则。
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梢料反滤围井的反滤细料厚为多少?
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Your company has an Active Directory domain. The main office has a DNS server named DNS1 that is configured with Active Directory-integrated DNS. The branch office has a DNS server named DNS2 that contains a secondary copy of the zone from DNS1. The two offices are connected with an unreliable WAN link. You add a new server to the main office. Five minutes after adding the server, a user from the branch office reports that he is unable to connect to the new server. You need to ensure that the user is able to connect to the new server. What should you do()
A、Clear the cache on DNS2.
B、Reload the zone on DNS1.
C、Refresh the zone on DNS2.
D、Export the zone from DNS1 and import the zone to DNS2.
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实际上白蚁和蚂蚁是两类远房的昆虫,没有任何的()关系。
A、血统
B、亲缘
C、隶属
D、亲属
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160km/h及以下区段的线岔定位拉出值不大于()mm。
A、350
B、400
C、450
D、500