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【简答题】
电流源电路在集成运放中,常作为 电路和 电路;前者的作用是 ,后者的作用是 。
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【单选题】How did Elizabeth answer Lionel when he asked where was Mr. Johnson?
A.
she said he did not know here
B.
she said she did not know
C.
she said she did not know where he was
D.
she said he did not know her coming here
【单选题】Mr. Wang didn't tell us ______ in 2006. [ ]
A.
where he live
B.
where he lives
C.
where did he live
D.
where he lived
【单选题】以下关于Internet核心交换与边缘部分的抽象方法描述中,错误的是
A.
大型ISP运营商要向Internet管理机构申请大量的IP地址
B.
用户需要通过ISP接入到Internet
C.
最顶层的ISP称为Tier-1 ISP
D.
ISP等级需要上IETF申请
【单选题】Where did Mr. Porter read the article of Mr. Jefferson, the CEO of Walters Corporation?
A.
World Star Newspaper
B.
A book published by the Walters Company
C.
A magazine named the Economic Review
D.
George Commercial Group
【单选题】Mr. Wang didn't tell us _______ ten years ago. [ ]
A.
where he worked
B.
where did he work
C.
where he works
D.
where does he work
【单选题】Mr. Smith didn’t tell us .
A.
where does he live
B.
where he lived
C.
where did he live
【单选题】---I can’t find Mr. Smith .Where did you meet him this morning ? ---It was in the hotel ______he stayed .
A.
that
B.
which
C.
the one
D.
where
【单选题】以下关于Internet核心交换机与边缘部分的抽象方法,错误的是
A.
Internet系统而已看作边缘部分与核心交换机部分两部分组成
B.
核心交换部分包括由大量路由器互联的服务器集群
C.
核心交换部分为应用程序进程通信提供服务
D.
网络应用程序运行在端系统
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