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【单选题】
关于计算机网络及其结构模型，下列说法错误的是（）
A.
世界上第一个计算机网络是ARPAnet
B.
Internet最早起源于ARPAnet
C.
国际标准化组织ISO设计出了OSI/RM参考模型，即实际网络的执行标准
D.
TCP/IP参考模型分为4个层次
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参考答案：
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【单选题】忽略过滤介质阻力,滤饼不可压缩,恒压过滤时,过滤时间增加一倍,则过滤速率是原来的( )倍。
A.
1.414
B.
0.707
C.
2
D.
0.5
查看完整题目与答案
【单选题】The class ( )( )( ) over, we had a ( )( )( )discussion.
A.
been ... heat
B.
being ... heated
C.
is ... heating
D.
be ... heated
查看完整题目与答案
【简答题】I phoned my first teacher timeand again when I heard that he was ill, yet couldn’t . A. getthrough     B. get along C. getover        D. get hold of
查看完整题目与答案
【单选题】The children talked so loudly at dinner table that I had to struggle ____.
A.
to be heard
B.
to have heard
C.
hearing
D.
being heard
查看完整题目与答案
【简答题】I was sleeping soundly last night when I was awakened by someone’s groans（呻吟）.I listened , and heard it was from Sam，a student from Africa. I really wanted to go on sleeping, as I had insomnia（失眠）and ...
查看完整题目与答案
【单选题】Henry Durant put forward the idea because he
A.
had once fought in a war in Italy.
B.
had been wounded in a war.
C.
had assisted in treating the wounded.
D.
had seen the casualties and cruelties of war.
查看完整题目与答案
【单选题】The children talked so loudly at dinner table I had to struggle _________.
A.
to be heard
B.
to have heard
C.
hearing
D.
being heard
查看完整题目与答案
【单选题】忽略过滤介质阻力,滤饼不可压缩,恒压过滤时,操作压差增加一倍,则过滤速率是原来的( )倍。
A.
1
B.
2
C.
1.414
D.
0.5
查看完整题目与答案
【单选题】听力原文：M：You didn't go to the lecture last night either, did you? W：No，I had a severe headache． Q：What do we learn from this conversation? (13)
A.
The man went to the lecture, but the woman didn't.
B.
The woman went to the lecture, but the man didn't.
C.
Neither of speakers went to the lecture.
D.
Both speakers went to the lecture.
查看完整题目与答案
【单选题】忽略过滤介质阻力,板框过滤机恒压过滤,滤饼不可压缩。当压差增大一倍,则同样过滤时间里所得滤液量将( )。
A.
增大至原来的 1.414 倍；
B.
增大至原来的 2 倍；
C.
增大至原来的 4 倍；
D.
不变
查看完整题目与答案
相关题目：
【单选题】忽略过滤介质阻力,滤饼不可压缩,恒压过滤时,过滤时间增加一倍,则过滤速率是原来的( )倍。
A.
1.414
B.
0.707
C.
2
D.
0.5
查看完整题目与答案
【单选题】The class ( )( )( ) over, we had a ( )( )( )discussion.
A.
been ... heat
B.
being ... heated
C.
is ... heating
D.
be ... heated
查看完整题目与答案
【简答题】I phoned my first teacher timeand again when I heard that he was ill, yet couldn’t . A. getthrough     B. get along C. getover        D. get hold of
查看完整题目与答案
【单选题】The children talked so loudly at dinner table that I had to struggle ____.
A.
to be heard
B.
to have heard
C.
hearing
D.
being heard
查看完整题目与答案
【简答题】I was sleeping soundly last night when I was awakened by someone’s groans（呻吟）.I listened , and heard it was from Sam，a student from Africa. I really wanted to go on sleeping, as I had insomnia（失眠）and ...
查看完整题目与答案
【单选题】Henry Durant put forward the idea because he
A.
had once fought in a war in Italy.
B.
had been wounded in a war.
C.
had assisted in treating the wounded.
D.
had seen the casualties and cruelties of war.
查看完整题目与答案
【单选题】The children talked so loudly at dinner table I had to struggle _________.
A.
to be heard
B.
to have heard
C.
hearing
D.
being heard
查看完整题目与答案
【单选题】忽略过滤介质阻力,滤饼不可压缩,恒压过滤时,操作压差增加一倍,则过滤速率是原来的( )倍。
A.
1
B.
2
C.
1.414
D.
0.5
查看完整题目与答案
【单选题】听力原文：M：You didn't go to the lecture last night either, did you? W：No，I had a severe headache． Q：What do we learn from this conversation? (13)
A.
The man went to the lecture, but the woman didn't.
B.
The woman went to the lecture, but the man didn't.
C.
Neither of speakers went to the lecture.
D.
Both speakers went to the lecture.
查看完整题目与答案
【单选题】忽略过滤介质阻力,板框过滤机恒压过滤,滤饼不可压缩。当压差增大一倍,则同样过滤时间里所得滤液量将( )。
A.
增大至原来的 1.414 倍；
B.
增大至原来的 2 倍；
C.
增大至原来的 4 倍；
D.
不变
查看完整题目与答案
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