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Our experiment was conducted under optimal condition. The underlined part means ______.(2014-80)
A．perfect
B．proper
C．possible
D．proposed
答案
更多“Our experiment was conducted under optimal condition. The underlined part means ______.（20”相关的问题
第1题
If they ______ (not help)us, our experiment would have failed．
第2题
Our experiment was conducted under optimal conditions. The underlined part means ______
A．possible
B．proper
C．perfect
D．proposed
第3题
As for the speakers experiment, which statement is INCORRECT？
A．He used a pair of chopsticks in the experiment.
B．He tried to have a change and eat with the left hand.
C．It showed that making a change influences our mind.
D．It is the first time mat he used chopsticks to eat rice.
第4题
All of the following statements are true, EXCEPT that ________.
A) the invention of the assembly line has changed our lives
B) Henry Ford influenced virtually all manufacturing
C) Henry Ford’s experiment on the magneto was an immediate success
D) cars were originally manufactured in slaughterhouses
第5题
W: Sorry, but I've got one of my own to work on.
Q: What does the woman mean？
(14)
A．She's angry that he asked for help.
B．She's too busy to help.
C．She owns a laboratory.
D．She will help him on Thursday.
第6题
第7题
The difficulty of linking friendship【C15】______ similarity of personality probably【C16】______ the complexity of our personalities; we have many【C17】______ and therefore require a disparate group of friends to support us. This of course can explain why we may have two close friends who have little in【C18】______, and indeed dislike each other. By【C19】______ large, though, it looks as though we would do well to choose friends who【C20】______ us.
【C1】
A．that
B．which
C．what
D．if
第8题
【29】for us, we live in a universe that has at least important parts that are knowable. Our common-sense experience and our evolutionary history have【30】us to understand something of the workaday world. When we go into other realms, however, common sense and ordinary intuition【31】highly unreliable guides. It is stunning that as we go close to the speed of light our mass【32】indefinitely, we shrink toward zero thickness【33】the direction of motion, and time for us comes as near to stopping as we would like. Many people think that this is silly, and every week【34】I get a letter from someone who complains to me about it. But it is virtually certain consequence not just of experiment but also of Albert Einstein's【35】analysis of space and time called the Special Theory of Relativity. It does not matter that these effects seem unreasonable to us. We are not【36】the habit of traveling close to the speed of light. The testimony of our common sense is suspect at high velocities.
The idea that the world places restrictions on【37】humans might do is frustrating. Why shouldn't we be able to have intermediate rotational positions？ Why can't we【38】faster than the speed of light？ But【39】we can tell, this is the way the universe is constructed. Such prohibitions not only【40】us toward a little humility; they also make the world more knowable.
(1)
A．just
B．very
C．just not
D．not just
第9题
Bees and Color
On our table in the garden we put a blue card, and all around this blue card we put a number of different gray cards. These gray cards are of all possible shades of gray land include white and black. on each card a watch-glass is placed .The watch-glass on the blue card has some syrup (果汁) in it; all the others are empty. After a short time bees find the syrup, and they come for it again and again. Then, after some hours, we take away the watch-glass of syrup which was on the bluecard and put an empty one in its place.
Now what do the bees do？ They still go straight to the blue card, although there is no syrup there. They do not go to any of the gray cards, in spite of the fact that one of the gray cards is of exactly the same brightness as the blue card. Thus the bees do not mistake any shade of gray. for blue. In his way we have proved that they do really see blue as a color.
We can find out in just the same way what other colors bees can see. It turns out that bees can see various colors, but these insects differ from us as regards their color-sense in two very interesting ways. Suppose we train bees to come to a red card, and, having done so, we put the red card on the table in the garden among the set of different gray cards. This time we find that the bees mistake red for dark gray or black. They cannot distinguish between them. This means that red is not a color at all for bees; for them it is just dark gray or black.
That is one strange fact; here is another. A rainbow is red on one edge, violet on the other. Outside the violet of the rainbow there is another color which we cannot see at all. This color beyond the violet, invisible to us, is called the ultra-violet. Although it is invisible, we know that the ultra -violet is there because it affects a photographic plate. Now, although we are unable to see ultra -violet light, bees can do so; for them ultra -violet is a colon Thus bees see a color which we cannot even imagine. This has been found out by training bees to come for syrup to various parts of a spectrum, or artificial rainbow, thrown by a prism on a table in a dark room. In such an experiment the insects can be taught to fly to the ultra-violet, which for us is just darkness.
Experiment with bees described in the first and second paragraphs tell us that bees regard blue as a colon
A．True
B．False
C．Not mentioned
第10题
What reason is there to think that we may actually detect intelligent life in outer space？ To begin with, modern theories of the development of stars suggest that almost every star has some sort of family of planets. So any star like our own sun (and there are billions of such stars in the universe) is likely to have a planet situated at such a distance that it would receive about the same amount of radiation as the earth.
Furthermore, such a planet would probably have the same general composition as our own; so, allowing a billion years or two--or three--there would be a very good chances for life to develop, if current theories of the origin of life are correct.
But intelligent life7 Life that has reached the stage of being able to send radio waves out into space in a conscious pattern7 Our own planet may have been in existence for five billion years and may have had life on it for two billion, but it is only in the last fifty years that we are capable of sending radio waves into space. From this it might seem that even if there were no technical problems involved, the chance of receiving signals from another planet would be extremely small.
This does not mean that intelligent life at our level does not exist somewhere. There are such an unimaginable number of stars that, even at such miserable odds, it seems certain that there are millions of intelligent life forms scattered through space. The only trouble is, none may be within our reach. Perhaps none never will be; perhaps the distances that separate us from our fellow inhabitants of this universe will forever remain too great to be conquered. And yet it is conceivable that someday we may come across one of them or one of them may come across us. What would they be like, these extraterrestrial(地球以外的) creatures？
If the radio waves had reached our planet one hundred years before, we would have______.
A．sent an immediate answer
B．sent an alarm against extraterrestrial attack
C．sent a short reply
D．sent no answer
