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【单选题】
阅读和理解下面程序段： class Manager extends Employee{ public Manager(String n,double s,int year,int month,int day){ super(n,S,year,month,day) bonus=0 } public double getSalary(){ double baseSalary=super.gerSalary() return baseSalary+bonus } public void setBonus(double B) {bonus=b； } private double bonus } Manager是Employee的子类，其理由是( )。A.
Manager的适用范围较宽
B.
extends关键字声明
C.
Manager的域减小了
D.
雇员是一个经理
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【单选题】______ me most was that the young boy who had lost both arms in an accident could handle a pen with his feet.
A.
That amazed
B.
It amazed
C.
Which amazed
D.
What amazed
【单选题】以下关于以太网交换机的说法( )是正确的
A.
以太网交换机是一种工作在网络层的设备
B.
以太网交换机最基本的工作原理就是802.1D
C.
生成树协议解决了以太网交换机组建虚拟局域网的需求
D.
使用以太网交换机可以隔离冲突域
【单选题】以下关于以太网交换机的说法那些是正确的是
A.
使用以太网交换机可以隔离冲突域
B.
以太网交换机是一种工作在网络层的设备
C.
以太网交换机可以隔离广播域
D.
以太网交换机可以限制广播风暴
【单选题】surprised me most was that they had finished the talk so quickly.
A.
Which
B.
Why
C.
That
D.
What
【单选题】_____ surprised me most was that he made the same mistake again.
A.
It
B.
That
C.
What
D.
Which
【简答题】GSP共分4章,分别是( )、( )、( )、( )
【单选题】______ touched me most was that the poor old lady donated all her savings to support one dropout.
A.
That
B.
It
C.
Which
D.
What
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