What could be a result of insufficient lubrication of lifeboat winches and davits?（）

A . low lube oil temperature B . low starting air temperature C . air bubbles in the fuel oil system D . water in the starting air system

A .  The control file will be multiplexed. B .  The control file will be recreated. C . The script containing the CREATE CONTROLFILE statement will be created. D .  The binary backup of the control file will be created.

A .  IEEE 802.1Q B .  IEEE 802.10 C .  Misconfigured NIC D .  User configuration E .  All of the above

A . password encryption service B . changes to the config-register setting C . the xmodem privilege EXEC mode command to recover the Cisco IOS image D . ROMMON

A . changing pump discharge pressure in response to normal load variations B . a high oil level C . incorrect fluid viscosity D . continued slow re-circulation of the oil

A . HostA is not on the same subnet as its default gateway B . The address of SwitchA is a subnet address C . The Fa0/0 interface on RouterA is on a subnet that cannot be used D . The serial interfaces of the routers are not on the same subnet E . The Fa0/0 interface on RouterB is using a broadcast addre

A . Compilation fails. B . An exception is thrown at runtime. C . The code executes and prints "StartedComplete". D . The code executes and prints "StartedComplete0123". E . The code executes and prints "Started0123Complete".

A .  The user， Scott， is dropped， all the objects in Scott’s schema are placed in the Recycle Bin， and the objects that are  already in the Recycle Bin are dropped. B .  The user， Scott， is dropped， all the objects in Scott’s schema are placed in the Recycle Bin， and all the objects in the Recycle Bin， belonging to the user Scott， are not dropped. C .  The user， Scott， is dropped， all the objects in the Scott’s schema are not placed in the Recycle Bin， and the objects in the Recycle Bin， belonging to the user， Scott， are not dropped. D .  The user， Scott， is dropped， all the objects in Scott’s schema are not placed in the Recycle Bin， and the objects in the Recycle Bin are dropped.

A . The new IOS image is too large for the router flash memory. B . The TFTP server is unreachable from the router. C . The new IOS image is not correct for this router platform. D . The IOS image on the TFTP server is corrupt. E . There is not enough disk space on the TFTP server for the IOS image.

A . It will supplement domestic savings B . It will loosen the financial constraint C . It will push incomes up D . It will bring technology and skills from abroad

A . booster pump coming on the line and discharging properly B . booster pump failing to start C . booster pump being lined up in the wrong direction D . ship's pump speeding u

A . A remote physical layer problem exists. B . The host NIC is not functioning. C . TCP/IP has not been correctly installed on the host. D . A local physical layer problem exists.

A .  The job will be automatically disabled. B .  The job will never execute. C .  The job will attempt to execute but will fail. D .  The job will inherit the DEFAULT_SCHEDULE schedule. E .  A schedule object cannot be disabled.

A．Square Ａ. B．Square Ｂ. C．Square Ｃ. D．Square Ｄ.

A．Environment changes would make a difference of one"s reproduction. B．The beginning of menopause symbolized the lessening of hormones. C．The period of menopause demonstrated an adult women"s maturation. D．Migrants entered menopause later than those who stayed in their birth place.

A．using the "spell check" feature B．missing commas or periods C．using a formal greeting

It is the same in history. Many things have been forgotten because we do not have any written account of them. Sometimes men did keep a record of the most important happenings in their country，but often it was destroyed by fire or in a war. Sometimes there was never any written record at all because the people of that time and place did not know how to write. For example, we know a good deal about the people who lived in China 4, 000 years ago, because they could write and leave written records for those who lived after them. But we know almost nothing about the people who lived even 200 years ago in central Africa because they had not learned to write. Sometimes, of course, even if the people cannot write, they may know something of the past. They have heard about it from older people and often songs and dances and stories have been made about the most important happenings, and these have been sung and acted and told for many generations, for most people are proud to tell what their fathers did in the past. This we may call ？remembered history ” . Some of it has now been written down. It is not so exact or so valuable to us as written history is, because words are much more easily changed when used again and again in speech than when copied in writing. But if there are no written records, such spoken stories are often very helpful. Which of the following is NOT suggested in the passage？ A.Written history is more reliable. B.Written records play an important role in learning about history. C.A written account of our daily activities helps to answer many questions. D.Where there are no written records, there is no history. Little is known about the central Africa 200 years ago because ______.A.there was nothing worth writing down at that time B.people there ignored the importance of keeping a record C.people there did not know how to write D.the written records were perhaps destroyed by a fire “ Remembered history” refers to ______.A.history based on a person’s imagination B.stories of important happenings passed down from mouth to mouth C.songs and dances about the most important events. D.both B and C “ Remembered history” is regarded as valuable only when ______.A.it is written down B.No written account is available C.it proves to be timely D.People are interested in it It is suggested that we could have learned more about our past if ancient people had ______.A.kept a written record of every past event B.burnt their written records in wars C.told exact stories of the most important happenings D.made more songs and dances 请帮忙给出每个问题的正确答案和分析，谢谢！

In practice, what often happens is that a new theory is devised that is really an extension of the previous theory. For example, very accurate observations of the planet Mercury revealed a small difference between its motion and the predictions of Newton's theory of gravity. Einstein's general theory of relativity predicted a slightly different motion from Newton's theory. The fact that Einstein's predictions matched what was seen, while Newton's did not, was one of the crucial confirmations of the new theory. However, we still use Newton's theory for all practical purposes because the difference between its predictions and those of general relativity is very small in the situations that we normally deal with. (Newton's theory also. has the great advantage that it is much simpler to work with than Einstein's ! ) It turns out to be very difficult to devise a theory to describe the universe all in one go. Instead, we break the problem up into bits and invent a number of partial theories. Each of these partial theories describes and predicts a certain limited class of observations, neglecting the effects of other quantities, or representing them by simple sets of numbers. It may be that this approach is completely wrong. If everything in the universe depends on everything else in a fundamental way, it might be impossible to get close to a full solution by investigating parts of the problem in isolation. Nevertheless, it is certainly the way that we have made progress in the past. The classic example again is the Newtonian theory of gravity, which tells us that the gravitational force between two bodies depends only on one number associated with each body, its mass, but is otherwise independent of what the bodies are made of. Thus one does not need to have a theory of the structure and constitution of the sun and the planets in order to calculate their orbits: Today scientists describe the universe in terms of two basic partial theories-the general theory of relativity and quantum mechanics. They are the great intellectual achievements of the first half of this century. Unfortunately, however, these two theories are known to be inconsistent with each other-they cannot both be correct. One of the major endeavours in physics today, is the search for a new theory that will incorporate them both-a quantum theory of gravity. We do not yet have such a theory, and we may still be long way from having one, but we do already know many of the properties that it must have. According to the passage, why can't any physical theory be permanently established？ A．Such a theory is only suggested as a possible way of explaining an idea. B．The person proposing such a theory may be incompetent. C．Observations always disagree with predictions. D．Observations are always falsified by predictions.

<img src='https://img2.soutiyun.com/shangxueba/ask/17133001-17136000/17135247/2c9611256b04bdd5ba39c52e4e7dd450.png' /> A. The pending area is automatically submitted after the plan creation B. The procedure must be executed before creating the resources plan directive C. The SYS_GROUP resource consumer group is not included in the resource plan directive D. The OTHER_GROUPS resources consumer group is not included in the resource plan directive

A．5’-UGUACGAUACCUUAC-3’ B．5’-CAUUCCAUAGCAUGU-3’ C．5’-GUAAGGUAUCGUACA-3’ D．5’-ACAUGCUAUGGAAUG-3’