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A Cisco Aironet 1020 controller-based access point has been connected to a Catalyst 3550-24 PWRSwitch. However， when it is powered up， the access point fails. What has caused this problem？（）
A . access point does not support 802.11h
B . incorrect switch power supply
C . switch port is not enabled
D . switch does not support 802.3af
E . access point has not been initialized with the primary controller
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Take these pills three times a day. Come back and see me in a week.（）
A . Thank you very much indeed.
B . I can't make it.
C . I haven't decided yet.
D . Good idea!
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Ammonia when used as a refrigerant is valuable because of its high efficiency, it is however （）.
A . toxic
B . flammable
C . explosive
D . all of the above
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Hurricanes may move in any direction．However，it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the（）.
A . West or northwest
B . Northeast
C . Southeast
D . North
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R-12 is generally considered to be a safe, nontoxic, nonflammable, and non-explosive refrigerantIt can, however, become highly toxic when （）.
A . superheated outside the system
B . in contact with an open flame
C . heated to the boiling point
D . All of the above
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A Cisco Aironet 1020 controller-based access point has been connected to a Catalyst 3550-24PWR Switch. However， when it is powered up， the access point fails. What has caused this problem？（）
A . access point does not support 802.11h
B . incorrect switch power supply
C . switch port is not enabled
D . switch does not support 802.3af
E . access point has not been initialized with the primary controller
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A cisco aironet 1020 controller-based access point has been connected to a catalyst 3550-24 pwr switch. however， when it is powered up， the access point fails. What has caused this problem？（）
A . access point does not support 802.11h
B . incorrect switch power supply
C . switch port is not enabled
D . switch does not support 802.3af
E . access point has not been initialized with the primary controller
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A fire starts when the following （） factors come together.
A . combustible material
B . ignition source
C . oxygen
D . A and B and C
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You are crossing a narrow channel in a 15-meter vessel when you sight a tanker off your port bow coming up the channel. Which statement is TRUE? （）
A . Yours is the give-way vessel because it is less than 30 meters long
B . You shall not impede the safe passage of the tanker
C . The tanker is the stand-on vessel because it is to port of your vessel
D . The tanker is the stand-on vessel because it is the larger of the two vessel
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John invited me out tomorrow, but I have to ___1______for my ___2___. I told him when I'll be ___3____ and we found a time good for both of us. He said he 'll come and____4___ me ____5____
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17. When the couple _______ here, they ________ to the park.A) will come；will go B) come；go C) will come；go D) come；will go
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“when, meanwhile, never, earlier” are not transitions for maintaining a time sequence.
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To show a relative location, you can use – on the other hand, however, in contrast, nonetheless, nevertheless, yet, at the same time, conversely.
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Paraphrase the underlined words in the following sentence. There’s a likelihood, however, that half or more of your study time will be devoted to such books.
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Managers can eliminate ________ costs entirely for a given year in dire times such as a major recession. However, managers cannot eliminate ________ costs.
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Unlike values, however, _______ may change over a period of time, whereas beliefs and values tend to be much more enduring.
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Online shopping is superior to shopping in a supermarket when it comes to（ ）.
A、time-efficiency
B、money-efficiency
C、the reliability of the products
D、variety of the products
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I can not imagine a time when ____ to solve.
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Please let me know ___________ when you decide to come for a visit.
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When you come here for your holiday next time, don' t go to_____hotel ; I can find you ______bed in my flat.
A．the ; a
B．the; /
C．a ; the
D．a; /
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She is a woman too conservative to ____ the times, however, she is good－natured and treats others sincerely.
A. come up with
B. keep up with
C. keep away from
D. put up with
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Rodney Mace, 35, is married with two young children, and is a part-time teacher of architectural history. "I am constantly surprised by other people's surprise, when they come to the house and see me cleaning a floor or hanging out the washing. Their eyes open wide at the sight of it! Much of the comment comes from men, but I am even more surprised at the number of women who comment too."
His wife Jane, an Oxford graduate in modern languages, has a demanding full-time job. She is director of the Cambridge House literacy scheme for adults in South London. Her working week involves several evenings and Saturdays, and at these times her husband is in sole charge of home and family. Apart from this, they share household jobs and employ a child-minder for the afternoons. This enables him to teach two days a week and to do what he considers is his principal work: writing. He has written several books and spends much of his time in the British Museum Reading Room, cycling there from his home in Brixton.
People ask the Maces if they think that their children miss them. One can argue that satisfied parents generally have satisfied children, but in any case the Maces are careful to reserve time and energy to play with their children. "And they have now developed relationships with other adults and children."
Previously, Rodney Mace worked full - time and Jane only part-time. Then 18 months ago, the director of the literacy scheme left. "It seemed to me that Jane was very' well suited to do this job. She was very doubtful about it. But I urged her to apply. She did, and she got it." Jane Mace confirms that she needed this encouragement, as so many women initially do.
Did his male ego suffer from the changeover？ Nothing like that occurred. But he still seems amazed at the way it changed his thinking. "I felt that we were finally going to be partners. I felt enormous relief. I wasn't avoiding responsibility, but changing it. Our relationship is so much better now. It has been a change for the good for both of us——I think for all of us, in every aspect of our lives. I cannot overemphasize that in every aspect. I think it is fundamental that the woman works. The idea of equal partnership is an illusion if one partner doesn’t work."
The article is about a couple whose married life is happier because _______.
A．they have a truly equal partnership
B．the husband enjoys staying at home
C．they earn more money
D．the wife has a full-time job
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When foreigners come to China for the first time, ...
When foreigners come to China for the first time, (当外国人第一次来到中国的时候，) they are always surprised by the number of bicycles on the roads. China has more cyclists than any other country in the world. Because the roads are so crowded with bicycles, it is very important for cyclists to remember the traffic rules and regulations. Before you ride your bicycle on the roads, you must register it and get a number for it. This number will be on a plate on your bicycle. Also, the traffic authorities will want to check the bicycle to make sure that it is in good condition. Young children may not ride bicycles in the streets, because there is so much traffic that is dangerous. A cyclist must keep at least a bicycle may not carry more than one adult person. On which side of the road should you ride？ On the right, of course! If you ride on the left of the road, against the traffic, you may you must follow all traffic signs and signals. Everybody knows that you must not turn left or go straight across at a red traffic light. Usually you can turn right, but you must check first to make sure that the road is clear. If you want to turn or stop, you must give a signal to the cyclists who are riding behind you. Give a signal with your hand at least ten meters a parked car, you must be careful in case the door opens suddenly or the car starts and drives out in front of you. Remember these rules and regulations when you ride your bicycle, and help to keep China's roads safe. It is important for cyclists in China to remember the traffic rules because the roads are crowded with bicycles.A.T
B.F
Before you take your bicycle out on the roads you must check the condition of the authorities.A.T
B.F
At a red traffic light you must give a hand signal.A.T
B.F
It is wrong to ride with both hands off the handlebars.A.T
B.F
If you ride on the left side of the road, you will be against the trafficA.T
B.F
