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【多选题】
在ISO OSI/RM中对网络安全服务所属的协议层次进行分析,要求每个协议层提供网络安全服务,其中,用户身份认证在( )进行,而IP过滤型防火墙在( )通过控制网络边界的信息流动来强化内部网络的安全性。A.
A．网络层
B.
B．会话层
C.
物理层
D.
应用层
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【单选题】It is not until 1768 when______first claimed possession of the eastern part of Australia for his country that the continent began to be explored by Europeans.
A.
James Cook of Britain
B.
William Dampier of Britain
C.
Willem Jansz of the Netherlands
D.
Luis Vaez de Torres of Spain
【单选题】It is not until May, 2013 the online consultation comes to an end the draft will be officially in force．
A.
when; that
B.
that; that
C.
that; when
D.
before; that
【单选题】目前，除了传统的串口和并口外，计算机与外部设备连接的标准接口越来越多。例如，（1）是一种连接大容量存储设备的并行接口，数据宽度一般已为32位，且允许设备以雏菊链形式接入；（2）是一种可热插拔的高速串行设备接口，也可允许设备以雏菊链形式接入；（3）则用来连接各种卡式设备，已广泛使用于笔记本电脑中。空白（1）处应选择（）
A.
VESA
B.
USB
C.
SCSI
D.
PCI
【判断题】It is not until in the last stanza that Shelley began to change his angle to "I" in the Ode to the West Wind.
A.
正确
B.
错误
【单选题】It is not until we know more about the situation ______ we are able to improve it.
A.
that
B.
what
C.
when
D.
which
【简答题】It is not until about the time the child enters school that outside forces contributeto feelings about the self.
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