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【单选题】
以下关于二层以太网交换机的描述正确的是？（）
A.
以太网交换机能够根据报文的内容判断是否有环路存在
B.
以太网交换机在数据转发时可以根据需要修改报文内容
C.
以太网交换机对用户来说是透明的，它不对所转发的报任何修改
D.
以太网交换机在环路存在的情况下一样可以正常工作
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举一反三
【单选题】I. Reading Comprehension: Choose the best one to fill in the blank. People have been painting pictures for at least 30,000 years. The earliest pictures were painted by people who hunted animals. They ...
A.
the hunters wanted to see the pictures
B.
the painters were animal lovers
C.
the painters wanted to show imagination
D.
the pictures were thought to be helpful
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【单选题】Choose the one which can fully express the meaning of the words given blow. I looked at her hard. She had filled her bottom lip with checkerberry snuff and it gave her face a kind of dopey, hangdog lo...
A.
pristine
B.
prodigal
C.
protract
D.
scent
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【判断题】为了便于检查和防止遗漏,地形碎部测量时一般采用顺时针观测法,边测边绘,绘制出局部地形图。
A.
正确
B.
错误
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【单选题】Choose the correct one.
A.
Sir/Madam, we don't  have  this kind of drink on board.
B.
Please change to another kind.
C.
We don ' t have enough for you. I suggest you  change another kind.
D.
I'm afraid we don't have mango juice on this flight. May I offer you apple juice instead?It's sweet and tasty, too.
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【简答题】Task 1 Choose the correct sentences from the table to fill in the blanks. A. When shall I check in? B. What kind of room do you want? C. What can I do for you? D. Oh, it’s expensive, I think. E. Is th...
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【单选题】某船正浮时由淡水进入海水，漂心在浮心之前，则在海水中时：
A.
首倾
B.
尾倾
C.
正浮
D.
纵倾状态不定
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【简答题】阅读理解。 Michael is the kind of guy you love to hate. He is always in a good mood and always has something positive to say. One day I went up to Michael and asked him, 'I don't get it. You can't be posit...
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【单选题】某船正浮时由淡水进入海水,漂心在浮心之前,则在海水中时 (40523:第三章_吃水差:974)
A.
首倾
B.
尾倾
C.
正浮
D.
纵倾状态不定
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【简答题】Task 4 listen and write down the words you hear to complete the gaps. 1. I’m ringing about your _____________________ in the Evening Gazattle. 2. Could you tell me what kind of ___________ you are loo...
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【简答题】Choosing the right school for your child may be one of the most important choices you will ever make for his or her future. It's surprising that so few tools are available to help make such a decision...
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相关题目：
【单选题】I. Reading Comprehension: Choose the best one to fill in the blank. People have been painting pictures for at least 30,000 years. The earliest pictures were painted by people who hunted animals. They ...
A.
the hunters wanted to see the pictures
B.
the painters were animal lovers
C.
the painters wanted to show imagination
D.
the pictures were thought to be helpful
查看完整题目与答案
【单选题】Choose the one which can fully express the meaning of the words given blow. I looked at her hard. She had filled her bottom lip with checkerberry snuff and it gave her face a kind of dopey, hangdog lo...
A.
pristine
B.
prodigal
C.
protract
D.
scent
查看完整题目与答案
【判断题】为了便于检查和防止遗漏,地形碎部测量时一般采用顺时针观测法,边测边绘,绘制出局部地形图。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Choose the correct one.
A.
Sir/Madam, we don't  have  this kind of drink on board.
B.
Please change to another kind.
C.
We don ' t have enough for you. I suggest you  change another kind.
D.
I'm afraid we don't have mango juice on this flight. May I offer you apple juice instead?It's sweet and tasty, too.
查看完整题目与答案
【简答题】Task 1 Choose the correct sentences from the table to fill in the blanks. A. When shall I check in? B. What kind of room do you want? C. What can I do for you? D. Oh, it’s expensive, I think. E. Is th...
查看完整题目与答案
【单选题】某船正浮时由淡水进入海水，漂心在浮心之前，则在海水中时：
A.
首倾
B.
尾倾
C.
正浮
D.
纵倾状态不定
查看完整题目与答案
【简答题】阅读理解。 Michael is the kind of guy you love to hate. He is always in a good mood and always has something positive to say. One day I went up to Michael and asked him, 'I don't get it. You can't be posit...
查看完整题目与答案
【单选题】某船正浮时由淡水进入海水,漂心在浮心之前,则在海水中时 (40523:第三章_吃水差:974)
A.
首倾
B.
尾倾
C.
正浮
D.
纵倾状态不定
查看完整题目与答案
【简答题】Task 4 listen and write down the words you hear to complete the gaps. 1. I’m ringing about your _____________________ in the Evening Gazattle. 2. Could you tell me what kind of ___________ you are loo...
查看完整题目与答案
【简答题】Choosing the right school for your child may be one of the most important choices you will ever make for his or her future. It's surprising that so few tools are available to help make such a decision...
查看完整题目与答案