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【单选题】
若零均值平稳序列 ,其样本 ACF呈现截尾性,其样本PACF呈现拖尾性,则可初步认为对 应该建立 的 模型 为 。A.
AR(2)
B.
ARMA(1,1)
C.
MA(2)
D.
ARIMA(2,1,2)
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举一反三
【单选题】On AIX systems， where DNS resolution takes precedence over NIS， a particular process needs to resolve names using /etc/hosts first. Which of the following processes is the best way to accomplish this...
A.
Set the NSORDER environmental variable of the environment which invokes the process to：NSORDER="local，nis，bind"
B.
Set the NSORDER environmental variable of the environment which invokes the process to： NSORDER="hosts=auth，nis，bind"
C.
Edit /etc/netsvc.conf to add a line similar to the following： process /full/path/of/process {hosts=local，nis，dns}
D.
Unset NSORDER environment variable of the environment which invokes the process
【单选题】David ____________ a sports meeting tomorrow. [ ]
A.
takes part in
B.
took part in
C.
is going to take part in
【单选题】He takes a part-time job every summer vacation, but most of the money he earns ________ playing computer games in the netbar.
A.
spend
B.
spends
C.
is spent
D.
are spent
【简答题】由于径向全跳动误差包括了 圆柱度 误差和 误差,当径向全跳动误差 不大于给定的圆柱度公差值时, 可以肯定圆柱度误差 超差。
【多选题】Which of the following are supported in Cisco Global Site Selector？ （）
A.
Full DNS functionality as a replacement of a DNS
B.
Responds to a DNS query with A-record
C.
Forwards queries to a name server
D.
Multiple A-records
E.
DHCP functionality for the local hosts
【单选题】Which of the following procedures best explains how to enable the NIS name resolution to take precedence over DNS on a system-wide basis?（）
A.
Add the following line to /etc/netsvc.conf: hosts = nis,bind,local
B.
edit /etc/netsvc.conf to add the following: process /full/path/of/process /{ hosts = local,nis,dns}
C.
In an NIS and DNS environment, NIS takes precedence over DNS in this environment resulting in no change
D.
Change the NSORDER environment variable
【简答题】The full name of DNS is .
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