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【多选题】
软件定义网络（SDN）将网络分为A.
控制层
B.
数据层
C.
链路层
D.
网络层
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】福利(benefits)
【多选题】Why benefits are important for employers?
A.
Benefits can keep the employees engaged and on board once they worked in the company.
B.
Benefits help to retain enjoyable and rewarding staff.
C.
Benefits can attract talents.
D.
Benefits can help employer differentiate its business from its competitors.
【简答题】已知:char a; int b; float c; double d ;
则表达式2+a+9*b*5*c-5*d的值是____。A. double B. int C. float D. boolean
【单选题】The fresh air _____ our health and we _____ it.
A.
benefits to; benefit
B.
benefits; benefit from
C.
benefits from; benefit
D.
benefits; are benefited by
【简答题】当期末汇率下降时，外币货币性资产会产生汇兑收益；汇率上升时，外币货币性负债会产生汇兑收益。（ ）
【单选题】下列表达式中,( )是非法的。已知 int a=5; float b=5.5;
A.
a%3+b
B.
b*b && ++a
C.
(a>b)+(int(b)%2)
D.
---a+b
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