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【单选题】
The following entry has been added to the syslog.conf file: *.emerg;mail,daemon.crit @ sysadmin Which of the following will result from this entry?（）A.
All messages at the emerg priority level and below from all facilities and messages at the crit priority level and below from the mail and daemon facilities are sent to the TTY of the user sysadmin.
B.
All messages at the emerg priority level and above from all facilities, all messages at any priority level from the mail facility, and all messages at the crit priority level and above from the daemon facilities are sent to the remote host sysadmin.
C.
All messages at the emerg priority level and above from all facilities and messages at the crit priority level and above from the mail and daemon facilities are sent to the remote host sysadmin.
D.
All messages at the emerg priority level and above from all facilities except for the mail facility and messages at the crit priority level and above from the daemon facility are sent to the TTY of the user sysadmin.
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举一反三
【简答题】数学优秀生应该有较为宽广的自然科学和 基础。
【多选题】GPS测量数据处理中的求差法是指通过对观测值或观测结果间一定方式的相互求差，消去或消弱求差观测值中所包含的相同或相似的误差影响，该方法可以消除或削弱（）等误差
A.
对流层延迟
B.
电离层延迟
C.
接收机钟差
D.
卫星钟差
E.
接收机噪声误差
参考解析：
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