皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【单选题】
服务与协议是完全不同的两个概念,下列关于它们的说法错误的是
A.
协议是水平的，即协议是控制对等实体间通信的规则。服务是垂直的，即服务是下层向上层通过层间接口提供的。
B.
OSI将层与层之间交换的数据单位称为协议数据单元PDU。
C.
协议的实现保证了能够一层提供服务。
D.
在协议的控制下，两个对等实体间的通信使得本层能够一层提供服务。要实现本层协议，还需要使用下面一层所提供的服务。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【简答题】A．Because it was his first job. B．Because it was too hard work for a kid of ten. C．Because they impressed on him the value of work. D．Because be earned enough money for his tuition.
查看完整题目与答案
【单选题】After his wife was killed in the earthquake, it was his daughter _____ managed the house and accompanied him
A.
whom
B.
that
C.
which
D.
what
查看完整题目与答案
【单选题】It was his friend's wife who came and broke the bad news that his friend's baby vas sent to the hospital.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】In his speech, he said that it was his primary school teachers that he was fond of ________influenced his whole life.
A.
what
B.
which
C.
who
D.
as
查看完整题目与答案
【简答题】《石羊河流域重点治理规划》实施以来，石羊河流入下游民勤的水量不断增加，地下水位得到稳定，巴丹吉林和腾格里两大沙漠的合围之势得到遏制。读图，回答1~3题。 1、民勤绿洲地下水水位最高的季节是 [     ] A、春季 B、夏季 C、秋季 D、冬季 2、水资源的定额分配是石羊河流域重点治理的主要手段，其产生的影响可能有： ①促进了高效节水技术的推广、②农作物的种植结构发生了变化、③农田灌溉面积缩小、④...
查看完整题目与答案
【单选题】It was his laziness and his rudeness that ______ his success.
A.
destroyed
B.
ruined
C.
damaged
D.
hurt
查看完整题目与答案
【简答题】（22分）阅读图文材料，完成下列要求。 材料一 汉水发源于陕西省汉中市，是我国中部地区水质最好的大河，自源头至丹江口为汉水上游（如图1所示）。曹冬柏 材料二  2014年1月6日，国务院正式批复陕西省设立西咸新区（如图2所示）。西咸新区是首个以创新城市发展方式为主题的国家级新区，将建成“快速交通连接，优美小镇点缀，都市农业衬托”的现代田园城市。曹冬柏 （1）分析秦岭对汉水上游水文特征的影响（10分...
查看完整题目与答案
【单选题】It was his courage, not his skill, really struck me most
A.
When
B.
Where
C.
Which
D.
That
查看完整题目与答案
【单选题】In his speech, he said that it was his primary school teachers that he was fond of ________influenced his whole life.
A.
what
B.
which
C.
as
D.
who
查看完整题目与答案
【单选题】— I think it was his excitement for his success in the first half that led to his eventual failure in the game. — You bet. Old sayings never fail, “________”
A.
Failure is the mother of success
B.
Pride goes before a fall
C.
A hero is nothing but a product of his time
D.
A fall into the pit, a gain in the wit
查看完整题目与答案
相关题目：
【简答题】A．Because it was his first job. B．Because it was too hard work for a kid of ten. C．Because they impressed on him the value of work. D．Because be earned enough money for his tuition.
查看完整题目与答案
【单选题】After his wife was killed in the earthquake, it was his daughter _____ managed the house and accompanied him
A.
whom
B.
that
C.
which
D.
what
查看完整题目与答案
【单选题】It was his friend's wife who came and broke the bad news that his friend's baby vas sent to the hospital.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】In his speech, he said that it was his primary school teachers that he was fond of ________influenced his whole life.
A.
what
B.
which
C.
who
D.
as
查看完整题目与答案
【简答题】《石羊河流域重点治理规划》实施以来，石羊河流入下游民勤的水量不断增加，地下水位得到稳定，巴丹吉林和腾格里两大沙漠的合围之势得到遏制。读图，回答1~3题。 1、民勤绿洲地下水水位最高的季节是 [     ] A、春季 B、夏季 C、秋季 D、冬季 2、水资源的定额分配是石羊河流域重点治理的主要手段，其产生的影响可能有： ①促进了高效节水技术的推广、②农作物的种植结构发生了变化、③农田灌溉面积缩小、④...
查看完整题目与答案
【单选题】It was his laziness and his rudeness that ______ his success.
A.
destroyed
B.
ruined
C.
damaged
D.
hurt
查看完整题目与答案
【简答题】（22分）阅读图文材料，完成下列要求。 材料一 汉水发源于陕西省汉中市，是我国中部地区水质最好的大河，自源头至丹江口为汉水上游（如图1所示）。曹冬柏 材料二  2014年1月6日，国务院正式批复陕西省设立西咸新区（如图2所示）。西咸新区是首个以创新城市发展方式为主题的国家级新区，将建成“快速交通连接，优美小镇点缀，都市农业衬托”的现代田园城市。曹冬柏 （1）分析秦岭对汉水上游水文特征的影响（10分...
查看完整题目与答案
【单选题】It was his courage, not his skill, really struck me most
A.
When
B.
Where
C.
Which
D.
That
查看完整题目与答案
【单选题】In his speech, he said that it was his primary school teachers that he was fond of ________influenced his whole life.
A.
what
B.
which
C.
as
D.
who
查看完整题目与答案
【单选题】— I think it was his excitement for his success in the first half that led to his eventual failure in the game. — You bet. Old sayings never fail, “________”
A.
Failure is the mother of success
B.
Pride goes before a fall
C.
A hero is nothing but a product of his time
D.
A fall into the pit, a gain in the wit
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题