Be carefully when you（）the derrick.
A . operate
B . operating
C . operated
D . operate
相似题目
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You work as a network engineer for . You study the exhibit carefully.
What happens when the switch 2 is connected to the rest of the network in the VTP domain Lab_Network？（）
Exhibit：
https://assets.asklib.com/images/image2/2018073016373365008.jpg
A . The recently introduced switch 2 removes all configured VLANs throughout the VTP domain.
B . The recently introduced switch 2 creates a STP loop in the VTP domain.
C . The recently introduced switch 2 switches over to VTP transparent mode in order to be included into the VTP domain.
D . A trunk should be configured between the two switches in order to integrate 2 into the VTP domain.
E . The recently introduced switch 2 adds one more VLAN to the VLAN database in the VTP domain.
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Exhibit：
https://assets.asklib.com/images/image2/2018073016154622176.jpg
You work as a network administrator at . You study the exhibit carefully.
What can be drawn about VLANs 200 and 202 from the exhibit？（）
A . VLAN 200 carries traffic from promiscuous ports to isolated， community， and other promiscuous ports in the same VLAN. VLAN 202 carries traffic between community ports and to promiscuous ports.
B . VLAN 200 carries traffic from promiscuous ports to isolated， community， and other promiscuous ports in the same VLAN. VLAN 202 carries traffic from isolated ports to a promiscuous port.
C . VLAN 202 carries traffic from promiscuous ports to isolated， community， and other promiscuous ports in the same VLAN. VLAN 200 carries traffic from isolated ports to a promiscuous port.
D . VLAN 202 carries traffic from promiscuous ports to isolated， community， and other promiscuous ports in the same VLAN. VLAN 200 carries traffic between community ports and to promiscuous ports.
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If you have to jump in the water when abandoning a vessel，your legs should be（）.
A . spread apart as far as possible
B . held as tightly against your chest as possible
C . in a kneeling position
D . extended straight down and crossed at the ankle
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When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）
A . plugging gooseneck tank vents to prevent accident overflow
B . maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C . sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D . maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the shi
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You work as a network engineer for . You study the exhibit carefully. From the configuration shown，
what can be determined？（）
Exhibit:
https://assets.asklib.com/images/image2/2018073016525496857.jpg
A . The remaining secure MAC addresses will be dynamically learned， converted to sticky secure MAC addresses， and added to the running configuration.
B . Since a voice VLAN is configured in this example， port security should be set for a maximum of 2.
C . The sticky addresses will only be those manually configured MAC addresses enabled with the sticky keyword.
D . A security violation will restrict the number of addresses to a maximum of 10 addresses per access VLAN and voice VLAN. The port will be shut down if more than 10 devices per VLAN attempt to access the port.
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You work as a network engineer for. You study the exhibit carefully.
What type of attack would be mitigated by this configuration？（）
https://assets.asklib.com/images/image2/201807301624156941.jpg
A . CDP manipulation
B . VLAN hopping
C . MAC spoofing
D . MAC flood attack
E . ARP spoofing
F . spanning tree compromise
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why should the SES operators be very careful when the ship enters the area where three ocean regions overlap? Because（）.
A . the weather over there is always terrible
B . the condition there is complicated
C . the signals are too strong
D . their SES may receive the signals from unwanted satellite
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When welding or burning aboard a vessel, you must be certain that the space （）.
A . is properly vented
B . contains no explosive fumes
C . has no oil in the bilges
D . all of the above
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When a crankshaft （） outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it.
A . has to be handled
B . may be handled
C . has being handled
D . will be handling
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In Turkey, when visiting someone in their home, be careful not to compliment your host on something or it may be given to you as a gift.
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When you are demonstrating comparative advantages, the items you are comparing need to be _________equivalents
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When creating a visual aid, you should keep in mind the size of the room in which you will be speaking? True or False
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The _____ in the downtown area is really poor today. I hope you are careful when you drive after class.
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35. When you navigate pipelines, which of the following garbage is always prohibited to be disposed into the sea
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Please be careful when you are drinking coffee in case you ________ the new carpet.
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Be careful when you cross this very busy streetIf not, you may______run over by a car.
A．have
B．get
C．become
D．turn
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听力原文：When you have a dog it is necessary to care for it very carefully. In return you will be loved by your dog.
The most important part of dog-care is cleanliness. Not only does the dog have to be kept clean, but his environment should also be clean. The bed he sleeps in can be made with anything like a rug or a dog mattress.
Proper feeding is also important for your dog's health. A dog should be fed in the same place and on a regular schedule. If your dog refuses to eat, don't force him. Remove his food and don't feed him again until his next regular feeding. Food should never be left before a dog for more than 30 minutes.
One important thing that many dog owners forget is exercise for the dog. Vigorous exercise helps build strength and keeps the dog healthy. A regular walk at a fixed time of the day is enough to help a smaller dog live a healthier end happier life. Large dogs, though, require a run in an open fid&
There are other things that are also important for a dog's health — things like bathing, care of the teeth and nails, keeping them away from insects as much as possible. But if you observe the three main points covered above, your dog will give you a great amount of pleasure.
(23)
A．Until he eats it.
B．All day.
C．At lease 30 minutes.
D．No more than 30 minutes.
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The invention of telephone has greatly eased the communication among people，but callers should be careful about when to make a phone call or it will cause embarrassments.
It is not customary to telephone someone very early in the morning in the USA. If someone is called very early in the morning，while he is shaving or having breakfast，the time of the call indicates great importance of the matter which requires immediate attention of the person called. The same implication is attached to telephone calls made after 11:00 p.m. at night. If someone receives a call during sleeping hours，he assumes it’s an urgency of life or death. The time chosen for the call communicates its importance. Time plays a very important role in our social life as you can imagine. In the USA an invitation should be sent to the guests in advance because guests usually believe that they are not highly regarded if the invitation to a dinner party is extended only three or four days before the party date. But it is not always necessarily true of the case all over the world. In some other countries，it may be taken stupid to make an appointment too far in advance because plans made for a date more than a week away tend to be forgotten. The concept of time varies in different regions of the world. Thus，misunderstandings are sometimes inevitable between men of different cultural backgrounds that treat time differently. Promptness is valued highly in America，for example. A lack of promptness is regarded as being impolite or not being fully responsible. In the US it would be incredible to keep a business partner or a guest waiting for an hour，and it would be too impolite and unacceptable by their social etiquettes. A person who is 5 minutes late is expected to give some words of explanation to the people waiting，though he might not complete his sentence.
16. What is the main idea of this passage？
A. It is not customary to telephone someone in the morning or in sleeping hours in the US.
B. The role of time in social life over the world..
C. If people are not prompt，they may be regarded as impolite or not fully responsible in the US.
D. Not every country treats the concept of time as the same.
17. What does it mean according to the passage if you call someone during his or her sleeping hours？
A. A matter of work.
B. A matter of life or death.
C. You want to see him or her.
D. You want to make an appointment with him or her.
18. Which of the following time is proper if you want to make an appointment with your friend？
A. At 7:00 a.m.
B. At 4:00 p.m.
C. At the midnight.
D. At 4:00 a.m.
19. Which of the following statements is true according to the passage？
A. In the USA guests tend to feel they are highly regarded if the invitation to a dinner party is expended only three or four days before the party date.
B. There id no misunderstanding between people from different cultures about the concept of time.
C. It may be considered foolish to make an appointment well in advance in the USA.
D. Being on time is highly valued in America.
20. From the passage we can infer that ____________.
A. it’s a matter of life or death if you call someone in daytime
B. the meaning of time differs in different parts of the world
C. it makes no difference in the US whether you are early or late for a business party
D. if a person is late for a date，he needn’t make any explanation
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You can’t be ________ careful in making the decision as it was such a critical case.
A) very
B) quite
C) too
D) so
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听力原文： The package containing the records appeared to be in perfect condition. But when we unpacked it with great care, we found that one record was completely smashed. Could you send us a new one？ I'll return the broken one at once.
(19)
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The article suggests that when a person__________ under unusual stress，he should be especially careful to have a well．balanced diet．
A.is
B.were
C.be
D.was
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It is hard to avoid mistakes. __ you correct them carefully, it will be all right. A. In the case B. As long as C. Although D. Despite
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Read the paragraph from the section "What To Do If You Come Into Contact With A Venomous Caterpillar." Instead, grab a stick. Remove the caterpillar with it. Be careful when you do so. What informatio
A．how to safely get the caterpillar off
B．why touching caterpillars can hurt
C．how many caterpillars are poisonous
D．what different caterpillars look like
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When you drive through the Redwood Forests in California, you will be trees that are over 100 years old（）
A．among
B．against
C．behind
D．below
