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【简答题】
在一预热器(间壁式热换器)内,用饱和水蒸汽将2000kg/h,含水气1%的湿空气从20 °C加热到120 °C。饱和水蒸汽的压强为300kPa(绝压),冷凝水在饱和温度下排出。假设保温良好,试求每小时的蒸气耗量。
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举一反三
【单选题】Which user authentication methods are available in JUNOS?（）
A.
MD5 and SHA
B.
RADIUS and TACACS only
C.
Local User Database
D.
Local user Database, RADIUS, and TACACS+
【多选题】Which two external authentication methods are supported by the Junos OS for user authentication?（）
A.
RADIUS
B.
KERBEROS
C.
LDAP
D.
TACACS+
【多选题】Which two statements regarding firewall user authentication client groups are true?（） (Choose two.)
A.
A client group is a list of clients associated with a group.
B.
A client group is a list of groups associated with a client.
C.
Client groups are referenced in security policy in the same manner in which individual clients are referenced.
D.
Client groups are used to simplify configuration by enabling firewall user authentication without security policy.
【多选题】Whitch three user authentication methos are supported by the Junos OS?（）
A.
RADIUS
B.
CHAP
C.
local user database
D.
tacacs+
E.
PAP
【多选题】Which two external authentication methods are supported by the Junos OS for user authentication?（）
A.
RADIUS
B.
KERBEROS
C.
IPsec
D.
TACACS+
【多选题】Which two statements regarding external authentication servers for firewall user authentication are true?（） (Choose two.)
A.
Up to three external authentication server types can be used simultaneously.
B.
Only one external authentication server type can be used simultaneously.
C.
If the local password database is not configured in the authentication order, and the configured authentication server bypassed.
D.
If the local password database is not configured in the authentication order, and the configured authentication server authentication is rejected.
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