-
2010.12 2. Have you ever noticed any (improve)________________ in the work environment of our factory?
-
Medical accidents__________ by drugs have attracted much attention in tha country.
-
Have you ever realized that attention___.your pronunciation?
-
Have you ever caught us giving __________ undeserved congratulations for doing well on a project?
-
You should decide which types of supporting materials you need. We have 7 types of materials that can be used in speeches: Personal experiences,Common knowledge,Direct observation, Examples, Documents,Statistics,Quotation.
-
Have you ever heard of Dubai? Where is it?
-
– Have you ever been to Beijing?No, but I wish I ___.
-
7. Where do you live?8. Have you ever studied in English?
-
Have you ever received ______ of what have happened to her？
A．the word
B．words
C．word
D．the words
-
Have you ever asked him the reason__________ may explain his absence from the class？ A．why B. when C. that D. what
-
Have you ever read Randolph&39;s work？ It is ex______ concerned with the effects of pollution on health.
-
Have&8194;you&8194;ever&8194;traveled&8194;on&8194;____&8194;train？&8194;
A．&8194;the&8194;
B．&8194;a&8194;’&8194;
C．&8194;an&8194;
D．&8194;/
-
听力原文：I do think you ought to get a small computer for your business. It would do most of the routine tasks in a tenth of the time you spend on them now. Then you'd have time to do other things. You'd soon wonder how on earth you ever managed with-out one.
(22)
-
Have you ever received____of what has happened to her？
A．the word
B．words
C．word
D．the words
-
Have you ever dreamed of traveling in space？ It was impossible a hundred years ago, nor was it 50 years ago. With the coming of the Space Age, man’ s dream of visiting the moon has come true.
The journey to the moon has been the first step towards future explorations in space. The distance between the moon and the Earth is very short indeed when compared with the distances between Earth and the other planets. Mars, the nearest planet to Earth is of miles away ! Traveling to the planets or travels between planets will be man’ s next aim. Such travels will be more difficult than the trip to the moon and certainly more exciting.
Recently, two American unmanned spacecraft, Vikings 1 and 2, landed on Mars in an attempt to discover whether that planet had any life on it. So far the presence of life on Mars has neither been proved nor ruled out. Russian space-probes have discovered that the surface of Venus is so hot that it is almost certain that there is no life there. Also the atmosphere of Venus is extremely, dense and the pressure is nearly a hundred times greater than the pressure of the Earth’s atmosphere.
Scientists believe that in the future, space stations can be built in space. These stations can act as stop-over points in space. Spacecraft can refuel at these stations and get their supply of air, food and water.
Spaceships of the future will be bigger and faster. They will be able to carry passengers for trips to the moon or planets.
Man may in the future find planets which have the same conditions as those we have on Earth, and make them his home. However such a possibility is still in the distant future. At the same time, Man should realize that the Earth will be his only home for a long time and begin to value and care for it.
Which of the following statements is true？
A．Recently, two American astronauts have landed on Mars.
B．The surface of Mars is very hot.
C．The journey to the moon started the future exploration in space.
D．There is life in Venus.
-
— Have you ever been to Tokyo？
— _________________.
A．Tokyo is a busy city
B．No, but I hope to go there next year
C．No, I didn't go there last year
-
Have you ever been to the Great Wall Every year_____________tourists visit it.
A．million
B．millions
C．million of
D．millions of
-
听力原文：W: Fm learning a lot in my philosophy class. Have you ever taken any courses in that department？
M: Only the one last year, none since then.
Q: What does the man mean？
(16)
A．He couldn't make any sense out of his course.
B．He hasn't taken more then one philosophy course.
C．He is a philosophy major.
D．He hasn't taken any philosophy course in that department.
-
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.
-
Have you ever listened to young children talking on the playground They are always boasti
Have you ever listened to young children talking on the playground They are always boasting（） Gavin. They reached the school gates. Still Gavin said nothing. “We’ve won,” Ted said to Harry, but he spoke too soon. On the way home, Gavin said, “My Dad is ___ 小题10: __ clean that he doesn’t have to bathe at all.”
-
While Monitoring the space usage in your database that is in ARCHIVELOG mode you observed that the flash recovery area does not have enough free space to accommodate any more files and you do not have necessary permissions to add more space to it.Identify the two events that can occur in the event of a log switch？（）
A.An entry is created in the alert log file and the database instance continues to function normally
B.The log switch hangs occur for transactions until free space is available in the flash recovery area
C.The Oracle database server deletes a file that is on the obsolete file list to make free space in the flash recovery area Oracle
D.The database instance statusis implicitly changed to RESTRICTED mode and file creations to the flash recovery area are prevented
-
Have you ever seen such ____ tall man？
A．the
B．any
C．a
D．one
-
—Have you ever been to Tibet —Yes. I have fantastic__________ of my trip there last summer.
A．time
B．experience
C．days
D．memories
-
--Have you ever been to the Great Wall --Yes. I ___ there last year.
A．have gone
B．have been
C．went
D．go
