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【单选题】
液体表面张力的测定和应用实验中配制一系列不同浓度的乙醇或正丁醇溶液,测定表面张力时这些溶液的先后次序是( )。A.
从浓向稀,最后测去离子水;
B.
从浓向稀,最先测去离子水。
C.
从稀向浓,最先测去离子水;
D.
从稀向浓,最后测去离子水;
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举一反三
【单选题】Which of the following is a metric that is commonly used in CRM?
A.
customer satisfaction index
B.
human capital return on investment
C.
turnover costs
D.
demand forecast accuracy
【单选题】In which solution is a router ACL used?
A.
protecting a server frome unauthorized acces
B.
controlling path selection,based on the route metric
C.
reducing router CPU utilization
D.
filterring packets that are passing through a router
【简答题】数控装置是数控系统的(-----),由硬件和软件两部分组成。
【单选题】A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric o...
A.
器已经学习了到达目标网络的三种可能路由。 一条路由来自EIGRP，其复合度量为20514560.。一条路由来自OSPF，度量值为782.。最后一条路由来自RIPv2，度量值为4。路由器在路由表中显示那种方式学到的路由？
B.
the OSPF route
C.
the EIGRP route
D.
the RIPv2 route
E.
all three routes
F.
the OSPF and RIPv2 routes
【简答题】数控装置的软件系统由 ()和() 两部分组成。
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