You observed the following output for a user session: https://assets.asklib.com/images/image2/2018080116285249397.jpg What do you infer from the preceding output?（）

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• If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should（）

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• You need to troubleshoot an issue on the switched LAN. When you issue a command "show port3/1" on a switch， you observe the Giants column has a non-zero entry. What could cause this？（）

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• If you observe more closely, Margaret is（）of the two girls.

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• When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）

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• You observe that the senior database administrator always uses the following command when connecting to Recovery Manager （RMAN）， and then starts executing commands to backup the database files：  $ rman target /  What would be the effect of this command？（）

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• You are inspecting the lower main precision bearings on a diesel engine.You observe that about half the thin Babbitt linings are of a milky white colourThis condition is caused by （）

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• From your position you observe a rotating white and green light to the north. This light is most likely（）.

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• Weather observations provided by each weather station include all of the following except（）.

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• What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.

  A . Huge waves approaching from all directions，clearing skies，light winds，and an extremely low barometer B . Flat calm seas，heavy rain，light winds，and an extremely low barometer C . Flat calm seas，heavy rain，light winds，and high pressure D . Huge waves approaching from all directions，clearing skies，light winds，and high pressure

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• Observe the following options carefully， which two attacks focus on RSA？ （）

  A . BPA attack B . Adaptive chosen ciphertext attack C . DDoS attack D . Man-in-the-middle attack

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• If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon（）.

  A . The center of the storm will by-pass you B . The storm will strike you on the starboard side C . You are in the direct path of the storm and should take immediate steps to batten down loose gear D . The storm is starting to break u

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• At night you observe a vessel ahead show three flashes of a white light. This signal indicates that the vessel ahead is（）.

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• Without an eye to observe and a mind to do real thinking, you cannot find the most suitable topic. _______

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• Please observe the following sentence and select the correct answer which reflects the numbers of language according to the sentence sequence. It is not your aptitude, but your attitude that decides your altitude.

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• Please observe the following sentence and select the correct answer which reflects the numbers of language according to the sentence sequence. Hope is the essence of life. A man without hope is nothing but a dry river.

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• In which of the following countries is the electronic observation most frequently used？

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• Please observe the following sentence and select the correct answer which reflects the numbers of language according to the sentence sequence.

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• Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it. No matter how many times the results of experiments agree with some theory, you can never be sure that the next time the result will not contradict the theory. On the other hand, you can disprove a theory by finding even a single observation that disagrees with the predictions of the theory. As philosopher of science, Karl Popper has emphasized a good theory is characterized by the fact that it makes a number of predictions that could in principle be disproved or falsified by observation. Each time new experiments are observed to agree with the predictions the theory survives, and our confidence in it is increased; but if ever a new observation is found to disagree, we have to abandon or modify the theory. At least that is what is supposed to happen, but you can always question the competence of the person who carried out the observation.

  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.

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