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【简答题】
芳烃分子上去掉一个氢原子后剩下的基团叫 ______________ ,可以用 _______ 表示。最常见的芳基有苯基,可写为 _______或_______或_______。 ( C 6 H 5 CH 2 - ) 称为 _______或_______。
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参考答案：
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【判断题】轧钢机机架是轧钢机机座中的重要零件，它用来安装轧辊、轧辊轴承座、轧辊调整装置及导位装置等工作机座中全部零部件，并承受全部轧制力，因而机架要有足够的强度和刚度。
A.
正确
B.
错误
查看完整题目与答案
【单选题】W: Hello, emergency line. What can I do for you? M: I am calling to report an accident. W: Could you give me some details, sir? M: A truck hit a car on Highway 204. W: Has anyone been badly ...
A.
A passer-by.
B.
The car driver.
C.
The truck driver.
D.
A policeman.
查看完整题目与答案
【单选题】The man， __________ is parked in front of our house， is a famous artist．
A.
the red car of which
B.
who's red car
C.
of whom the red car
D.
whose red car
查看完整题目与答案
【单选题】( )应采用相对独立分级设计,当其中任何一级系统故障时,均不应影响其他系统的正常运行:当故障解除后,应能自动进行系统的恢复处理。系统关键设备应冗余设置,重要数据应备份。
A.
列车自动运行系统
B.
车站联锁系统
C.
自动售检票系统
D.
行车指挥系统
查看完整题目与答案
【单选题】( )应采用相对独立分级设计,当其中任何一级系统故障时,均不应影响其他系统的正常运行:当故障解除后,应能自动进行系统的恢复处理。系统关键设备应冗余设置,重要数据应备份。
A.
车站联锁系统
B.
自动售检票系统
C.
列车自动运行系统
D.
行车指挥系统
查看完整题目与答案
【简答题】阅读理解。 A man was travelling abroad in a small red car．One day he left the car a nd went shopping.When he came back, its roof was badly damaged(损害)．Some boys told him that  an  elephan t had damaged it．...
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【单选题】Read and choose the best answer to complete the dialogue. W: Our car has taken us right to the foot of the Great Wall, Mr. Smith.M: Oh, what a marvelous sight it is! Could you tell me _____________...
A.
the width of the wall
B.
the depth of the wall
C.
the length of the wall
D.
the height of the wall
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【单选题】听力原文：M: The man at the gate thinks that I take good care of my car. W: Why does he think that? M: He couldn't see any dirty spots on the outside and the inside is clean, too. Q: What do you learn abou...
A.
He keeps his car in good condition.
B.
He has an accident.
C.
He is careless with his car.
D.
He likes old cars.
查看完整题目与答案
【判断题】机架是用来安装轧辊、轧辊轴承、轧辊调整装置和导卫装置等工作机座中的全部零部件，并承受全部轧制力的轧机部件。
A.
正确
B.
错误
查看完整题目与答案
【单选题】W: Think about this carefully. you must have left them somewhere. M: But the problem is that I need them now. I need them to start my car, and when I get home I have to use them to open the door. W: M...
A.
He lost his wallet
B.
He couldn't find his keys.
C.
He lost his mobile phone.
D.
He couldn't find his way.
查看完整题目与答案
相关题目：
【判断题】轧钢机机架是轧钢机机座中的重要零件，它用来安装轧辊、轧辊轴承座、轧辊调整装置及导位装置等工作机座中全部零部件，并承受全部轧制力，因而机架要有足够的强度和刚度。
A.
正确
B.
错误
查看完整题目与答案
【单选题】W: Hello, emergency line. What can I do for you? M: I am calling to report an accident. W: Could you give me some details, sir? M: A truck hit a car on Highway 204. W: Has anyone been badly ...
A.
A passer-by.
B.
The car driver.
C.
The truck driver.
D.
A policeman.
查看完整题目与答案
【单选题】The man， __________ is parked in front of our house， is a famous artist．
A.
the red car of which
B.
who's red car
C.
of whom the red car
D.
whose red car
查看完整题目与答案
【单选题】( )应采用相对独立分级设计,当其中任何一级系统故障时,均不应影响其他系统的正常运行:当故障解除后,应能自动进行系统的恢复处理。系统关键设备应冗余设置,重要数据应备份。
A.
列车自动运行系统
B.
车站联锁系统
C.
自动售检票系统
D.
行车指挥系统
查看完整题目与答案
【单选题】( )应采用相对独立分级设计,当其中任何一级系统故障时,均不应影响其他系统的正常运行:当故障解除后,应能自动进行系统的恢复处理。系统关键设备应冗余设置,重要数据应备份。
A.
车站联锁系统
B.
自动售检票系统
C.
列车自动运行系统
D.
行车指挥系统
查看完整题目与答案
【简答题】阅读理解。 A man was travelling abroad in a small red car．One day he left the car a nd went shopping.When he came back, its roof was badly damaged(损害)．Some boys told him that  an  elephan t had damaged it．...
查看完整题目与答案
【单选题】Read and choose the best answer to complete the dialogue. W: Our car has taken us right to the foot of the Great Wall, Mr. Smith.M: Oh, what a marvelous sight it is! Could you tell me _____________...
A.
the width of the wall
B.
the depth of the wall
C.
the length of the wall
D.
the height of the wall
查看完整题目与答案
【单选题】听力原文：M: The man at the gate thinks that I take good care of my car. W: Why does he think that? M: He couldn't see any dirty spots on the outside and the inside is clean, too. Q: What do you learn abou...
A.
He keeps his car in good condition.
B.
He has an accident.
C.
He is careless with his car.
D.
He likes old cars.
查看完整题目与答案
【判断题】机架是用来安装轧辊、轧辊轴承、轧辊调整装置和导卫装置等工作机座中的全部零部件，并承受全部轧制力的轧机部件。
A.
正确
B.
错误
查看完整题目与答案
【单选题】W: Think about this carefully. you must have left them somewhere. M: But the problem is that I need them now. I need them to start my car, and when I get home I have to use them to open the door. W: M...
A.
He lost his wallet
B.
He couldn't find his keys.
C.
He lost his mobile phone.
D.
He couldn't find his way.
查看完整题目与答案
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