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【单选题】
关于多行结构条件语句的执行过程，正确的是A.
各个条件所对应的＜语句序列＞中，一定有一个＜语句序列＞被执行
B.
找到＜条件＞为TRUE的第一个入口，便从此开始执行其后的所有＜语句序列＞
C.
若有多个＜条件＞为TRUE，则它们对应的＜语句序列＞都被执行
D.
多行选择结构中的＜语句序列＞，有可能任何一个＜语句序列＞都不被执行
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反馈参考答案：
举一反三
【单选题】WHAT IS TRUE CONCERNING PHYSICAL AND LOGICAL TOPOLOGIES?
A.
Logical topologies refer to how a network transfers data between devices.
B.
Physical topologies display the IP addressing scheme of each network.
C.
The logical topology is always the same as the physical topology.
D.
Physical topologies are concerned with how a network transfers frames.
【单选题】Which statement is true about logical units?（）
A.
Logical units are similar to VLANs used by other vendors.
B.
A logical unit is required for transit interfaces.
C.
Frame Relay encapsulation supports one logical unit.
D.
Link speed and duplex are configured in the logical unit properties.
【单选题】Which attribute of a logical volume can NOT be changed after it is created？（）
A.
The placement of the logical volume
B.
The stripe size of the logical volume
C.
The upper bound of the logical volume
D.
The intra-policy of the logical volume
【简答题】A．lawful B．historical C．natural D．logical
【单选题】Give the logical variables X=Y=1, the value of X ∨ Y(logical addition) is( ).
A.
1
B.
2
C.
10
D.
0
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