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【单选题】
关于网络应用的描述,以下哪一项是错误的A.
协同实现同一网络应用的不同应用进程之间有着对应的应用层协议
B.
不同网络服务有着相同的应用层协议
C.
网络应用由运行在不同终端上的网络应用进程协同实现
D.
网络应用是网络提供的服务
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反馈参考答案：
举一反三
【简答题】国家标准规定的优先、常用配合在孔、轴公差等级的选用上，采用“工艺等价原则”，公差等级高于IT8的孔均与高一级（）级的轴相配：低于IT8的孔均和同级（）级的轴相配。
【简答题】How did the listener request repetition?
【单选题】He was diagnosed with cancer last month, but he carried on with his work ______ nothing had happened.
A.
even thought
B.
as if
C.
so that
D.
in case
【简答题】He had understood nothing, _nor did he try to____ understand. 求翻译，谢谢！
【单选题】A: Jim had nothing for breakfast this morning, ? B: . He got up too late.
A.
had he; Yes
B.
hadn’t he; Yes
C.
did he; No
D.
didn’t he; Yes
【单选题】－Jim had nothing for breakfast this morning , ? － . He got up too late .
A.
had he, Yes.
B.
hadn' t he , Yes.
C.
did he , No .
【单选题】The man insisted that he ____ nothing wrong and that he _____ free.
A.
had done; be set
B.
did; was
C.
had done; would be
D.
did; would be
【单选题】He knew nothing about the matter, but he talked as if he __it.
A.
knows
B.
knew
C.
had known
D.
would know
【单选题】Why didn't John write a longer letter?
A.
He was fired
B.
He had to go out.
C.
He had nothing more to say.
【简答题】A．He had nothing to do with the Germans. B．He had been sending information to the Germans by playing piano. C．He was a spy planted by the German. D．He was a German.
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