题目内容
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If the sky fell down, what______ ？
A．did you think would happen
B．do you think would happen
C．do you think will happen
D．do you think will have happened
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更多“If the sky fell down, what____…”相关的问题
A.Quickly
B.Immediately
C.Slowly
D.Suddenly
What happened when the man let go the rope？
A. The box fell down and hit the man on the head.
B. The box continued to go up.
C. The man went up to the top of the building.
D. The man fell down and broke his legs.
As soon as you sat down, you fell asleep. I realized how ______.
A．tired you were
B．were you tired
C．you were tired
D．tired were you
The pile of books fell down from the shelf and ______ all over the floor.
A．scattered
B．slipped
C．extended
D．separated
heck) my side.________
A、examine
B、push
C、stop
D、pull
First he pulled the box up to the top of the building, and fastened the end of the rope so that the box could not come down. Then he climbed up the ladder and filled the box with bricks. Next he climbed down the ladder and untied the rope. Unfortunately the box of bricks was heavier than the man, and as a result he was pulled up by the: rope. Half-way up, the box of bricks hit him as it was coming down.
When he reached the top, his head hit the pulley. The box of bricks hit the ground and broke. As a result the bricks fell out. The box was then lighter than the man and consequently he began to come down and the box began to go up.
Half-way up, the box hit the man. The man still held on to the rope and the box therefore Continued to go up. The man then reached the ground. Then he let go the rope to rub his head. The box, of course, then fell down and hit the man on the head again. As a result, an ambulance came and took him to hospital
Why did the man fasten the end of the rope before he climbed up the ladder？
A．He was afraid that someone would steal his box.
B．Because he wanted to climb up along the rope.
C．He fastened the end of the rope in order to keep the box unmoved.
D．Because he wanted to prevent the box from coming down.
Passage Two
There was a big pile of bricks on the top of a tall building and a man
had to bring them down to the ground. He had a long rope which went over a pulley(滑轮) at the roof of the building. The other end was fastened to a big box.
First he pulled the box up to the top of the building, and fastened the end of the rope so that the
box could not come down. Then he climbed up the ladder and filled the box with bricks. Next
he climbed down the ladder and untied the rope. Unfortunately the box of bricks was heavier than
the man, and as a result he was pulled up by the: rope. Half-way up, the box of bricks hit him as it was coming down.
When he reached the top, his head hit the pulley. The box of bricks hit the ground and broke.
As a result the bricks fell out. The box was then lighter than the man and consequently he began
to come down and the box began to go up.
Half-way up, the box hit the man. The man still held on to the rope and the box therefore Continued to
go up. The man then reached the ground. Then he let go the rope to rub his head. The box, of
course, then fell down and hit the man on the head again. As a result, an ambulance came and took
him to hospital
40. Why did the man fasten the end of the rope before he climbed up the ladder？
A. He was afraid that someone would steal his box.
B. Because he wanted to climb up along the rope.
C. He fastened the end of the rope in order to keep the box unmoved.
D. Because he wanted to prevent the box from coming down.
How many men would have considered the possibility of an apple failing up into the tree？ Newton did because he was not trying to predict anything. He was just wondering. His mind was ready for the unpredictable. Unpredictability is part of the essential nature of research. If you don’t have unpredictable things, you don’t have research. Scientists tend to forget this when writing their cut and dried reports for the technical journals, but history is filled with examples of it.
In talking to some scientists, particularly younger ones, you might gather the impression that they find the "scientific method" a substitute for imaginative thought. I've attended research conferences where a scientist has been asked what he thinks about the advisability of continuing a certain experiment. The scientist has frowned, looked at the graphs, and said "The data are still inconclusive." "We know that," the men from the budget office have said, "but what do you think？" Is it worthwhile going on？ What do you think we might expect？" The scientist has been shocked at having even been asked to speculate.
What this amounts to, of course, is that the scientist has become the victim of his own writings. He has put forward unquestioned claims so consistently that he not only believes them himself, but has convinced industrial and business management that they are true. If experiments are planned and carried out according to plan is faithfully as the reports in the science journals medicate, then it is perfectly topical for management to expect research to produce results measurable ill dollars and cents. It is entirely reasonable for auditors to believe that scientists who know exactly where they arc going and how they will get there should not be distracted by the necessity of keeping one eye on the cash register while the other eye is on the microscope. Nor, if regularity and conformity to a standard pattern are as desirable to the scientist as the writing of his papers would appear to reflect, is management to be blamed for discriminating against the "odd balls" among re- searchers in favor of more conventional thinkers who "work well with the team".
The autor wants to prove with the example of Isaac Newton that ______.
A．inquiring minds are more important than scientific experiments
B．science advances when fruitful researches are conducted
C．scientists seldom forget the essential nature of research
D．unpredictability weighs less than prediction in scientific research
Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. (78)In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he bad. And besides, be is usually too careless to plant and look after new trees. So the forests slowly disappear.
This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil—allowing the rain to sink in—and also bind the soil, thus preventing it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing remains but worthless desert.
Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It set up the empire but, without its trees, its soil became poor and it grew weak. When the empire fell to pieces, the home country found itself faced with floods and starvation.
What is the most important service of trees to man according to the passage？
A．They help him make money.
B．They give. him wood and other products.
C．They help him prevent droughts and floods.
D．They give him shade.
The first real steps took place in France, in 1783.Two brothers, the Montgolfiers, made a very large “hot air balloon”.They knew that hot air rises.Why not fill a balloon with it？The balloon was made of cloth and paper.In September of that year，the King and Queen of France came to see the balloon.They watched it carry the very first air passengers into the sky.The passengers were a sheep and a chicken.We do not know how they felt about the trip.But we do know that the trip lasted eight minutes and that the animals landed safely.Two months later，two men did the same thing.They rose above Paris in a balloon of the same kind.Their trip lasted twenty-five minutes and they travelled about eight kilometers.
26.Leonardo da Vinci ______ .
A.said that man would fly in the sky one day
B.built a kind of machine which never flew
C.drew many beautiful pictures of birds
D.made designs for flying machine
27.Eight hundred years ago an Englishman ______ .
A.made a kind of flying machine
B.tried to fly with wings made of chicken feather
C.wanted to build a kind of balloon
D.tried to fly on a large bird
28.In fact，the Englishman who tried to fly ______ .
A.lost his life
B.flew only 8minutes
C.got badly wounded
D.succeeded in flying
29.The very first air passengers in the balloon were ______.
A.two animals
B.two Frenchmen
C.the King and the Queen
D.the Montgolfiers
30.When did two Frenchmen rise above Paris？______
A.In December 1783.
B.In September 1783.
C.In November 1783.
D.In the seventeenth century.
