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A．Seeing
B．To be seen
C．Seen
D．Having seen
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更多“______from space, our earth, with water covering 70% of its surface, appears as a "blue pl”相关的问题
第1题
From the passage we can see that astronomy is______.
A．the life experience of great men
B．the movement of the stars and the planets
C．the scientific study of natural objects in space
D．the theories developed by scientists of old times
第2题
The article suggests that______.
A. our earth exists before the sun
B. how space formed
C. no one knows where the earth comes from
D. our earth used to be part of a high mountain on the sun
第3题
Space Tourism
Make your reservations now. The space tourism industry is officially open for business, and tickets are going for a mere ＄20 million for a one-week stay in space. Despite reluctance from National Air and Space Administration (NASA), Russia made American businessman Dennis Tiro the world's first space tourist. Tito flew into space aboard a Russian Soyuz rocket that arrived at the International Space Station (ISS) on April 30, 2001. The second space tourist, South African businessman Mark Shuttleworth, took off aboard the Russian Soyuz on April 25,2002, also bound for the ISS.
Lance Bass of N Sync was supposed to be the third to make the ＄20 million trip, but he did not join the three-man crew as they blasted off on October 30, 2002, due to lack of payment. Probably the most incredible aspect of this proposed space tour was that NASA approved of it.
These trips are the beginning of what could be a profitable 21st century industry. There are already several space tourism companies planning to build suborbital vehicles and orbital cities within the next two decades. These companies have invested millions, believing that the space tourism industry is on the verge of taking off.
In 1997, NASA published a report concluding that selling trips into space to private citizens could be worth billions of dollars. A Japanese report supports these findings, and projects that space tourism could be a ＄10 billion per year industry within the next two decades. The only obstacles to opening up space to tourists are the space agencies, who are concerned with safety and the development of a reliable, reusable launch vehicle.
Space Accommodations
Russia's Mir space station was supposed to be the first destination for space tourists. But in March 2001, the Russian Aerospace Agency brought Mir down into the Pacific Ocean. As it turned out, bringing down Mir only temporarily delayed the first tourist trip into space.
The Mir crash did cancel plans for a new reality-based game show from NBC, which was going to be called Destination Mir. The Survivor-like TV show was scheduled to air in fall 2001. Participants on the show were to go through training at Russia's cosmonaut (宇航员) training center, Star City. Each week, one of the participants would be eliminated from the show, with the winner receiving a trip to the Mir space station. The Mir crash has ruled out NBC's space plans for now. NASA is against beginning space tourism until the International Space Station is completed in 2006.
Russia is not alone in its interest in space tourism. There are several projects underway to commercialize space travel. Here are a few of the groups that might take tourists to space:
Space Island Group is going to build a ring-shaped, rotating "commercial space infrastructure (基础结构)" that will resemble the Discovery spacecraft in the movie "2001: A Space Odyssey." Space Island says it will build its space city out of empty NASA space-shuttle fuel tanks (to start, it should take around 12 or so), and place it about 400 miles above Earth. The space city will rotate once per minute to create a gravitational pull one-third as strong as Earth's.
According to their vision statement, Space Adventures plans to "fly tens of thousands of people in space over the next 10-15 years and beyond, around the moon, and back, from spaceports both on Earth and in space, to and from private space stations, and aboard dozens of different vehicles..."
Even Hilton Hotels has shown interest in the space tourism industry and the possibility of building or co-funding a space hotel. However, the company did say that it believes such a space hotel is 15 to 20 years away.
Initially, space tourism will offer simple accommodations at best. For instance, if the International Space Station is used as a tourist attraction, guest
A．Y
B．N
C．NG
第4题
A.The cylinders must be stowed at least 10 horizontal feet from corrosive materials in the same space
B.Stowage in the upper deck-deck is considered to be the equivalent of "on deck" stowage for this cargo
C.The cylinders must have a red label for flammability and a green label for compressed gas
D.The cylinders may be protected from the radiant heat of the Sun by laying a tarp on them
第5题
Why would things weigh only a quarter as much as they do at the surface of the earth if we took them 4,000 miles out into space？ The reason is this: All objects have a natural attraction for all other objects; this is called gravitational attraction, but this power of attraction between two objects gets weaker as they get farther apart. When the butter was at the surface of the earth, it was 4,000 miles from the center (in other words the radius[半径] of the earth is 4,000 miles). When we took the butter 4,000 miles out, it was 8,000 miles from the center, which is twice the distance.
If you double the distance between two objects, their gravitational attraction decreases (减少) two times two. If you treble (成三倍) the distance, it gets nine times weaker (three times three). If you take it four times as far away, it gets sixteen times weaker (four times four ) and so on.
The best title for this passage is______.
A．The Earth Weight
B．Weight in Space
C．Changing Weight on the Earth
D．Weight on and off the Earth
第6题
(教材课文原文)
_DIARY OF A SPACE ZUCCHINI _July 1
Today Gardener and his crew will depart in their seed pod; the replacement crew is ready to {A. carry away; B. carry on; C. carry through} in their place. He is wearing his space suit undergarments. Not too stylish but {A. functional; B. nonfunctional; C. conjunctional}. He gave all of us an extra long smell. His nose twitched with the slightest tickle from the leaf hairs on little Zuc. He said that what will be is for the best. It has been a wonderful journey; one chapter is closing, another is {A. to be opened; B. open; C. opening}. He had tears in his eyes, not just a small drop at the corners but a pool that was making him {A. to blink; B. blinking; C. blink}. He reached up and {A. turned up; B. turned out; C. turned down} the light. In the frontier you should not be afraid of the dark.
第7题
Today's astronomy students not only seek an up-to-date summary of astronomical facts: they ask, as people have asked for ages, about our basic relations to the rest of the universe. They may study astronomy partly to seek points of contact between science and other human endeavors: philosophy, history, politics, environmental action, even the arts and religion.
Science fiction writers and special effect artists on recent films help today's students realize that unseen worlds of space are real places—not abstract concepts. Today's students are citizens of a more real, more vast cosmos than conceptualized by students of a decade ago.
In designing this edition, the Wadsworh editors and I have tried to respond to these developments. Rather than jumping at the start into murky waters of cosmology, I have begun with the viewpoint of ancient people on Earth and worked outward across the universe. This method of organization automatically (if loosely) reflects the order of humanity's discoveries about astronomy and provides a unifying theme of increasing distance and scale.
This passage is most probably taken from
A．an article of popular science.
B．the introduction of a book of astronomy.
C．a lecture given by the author to astronomy students.
D．the preface of a piece of science fiction.
第8题
The model has shown that this radar system, known as laser-doppler radar, can measure with absolute precision speeds varying from spaceship orbital injection (进入) velocities (速度) of five miles per second down to virtual stops--speeds of less than one ten thousandth of an inch per second. According to the scientists who are developing this system, such fine measures of velocity are of prime importance in space missions. In a rendezvous (对接) between two spaceships, or in a landing approach by a vehicle onto an orbiting space station, a bump could rip open a ship's skin, or a nudge could knock the station out of its orbit.
The light-beam radar, which operates at a frequency of trillions (百万兆) of cycles per second, could easily detect and measure the movement of a vehicle edging up to a satellite space station. A control system using so precise a signal as this would allow a huge vehicle to dock at a space station as lightly as a feather.
Laser-doppler radar ______. ()
A．measures the movements of a spaceship by means of light beam
B．makes use of microwaves
C．makes use of sound waves
D．Both A and B
第9题
Italian astronaut Samantha Cristoforetti talks about daily life on the international Space Station(ISS).
For the last few months, my home has been the International Space Station, orbiting 400 km above the surface of the earth, at 25, 000 km per hour. We took off in a Russian Soyuz spaceship from Kazakhstan, and the flight to the Space Station took six hours. (1) I felt incredibly excited.
There are two Americans, three Russians, and me. (2) Fortunately, we all get on well. The day starts for everyone at 7 a.m. There's no gravity up here, so, every morning I float through the cabin to attend our daily planning conference, or DPC. (3) It usually lasts a few minutes. After it's finished. we speak to space centres around the world, including Houston (USA), Munich (Germany) and Tsukuba (Japan).
Then we have breakfast: oatmeal, eggs and coffee. In the past, astronauts had to suck food out of tubes. Nowadays, astronauts' food is served in special individual boxes with covers. (4) Life has become much easier for astronauts over the years.
Our dinner is at around 7.30 p.m. My meals were prepared by an Italian chef on Earth before left, and they're delicious. However, I do exchange a lot of food with my three colleagues from Russia.
(5) Their lentil and vegetable soup is also really good. Of course, I miss fresh food, but a cargo spaceship comes once a month with fresh fruit. When I get back down to Earth, I know I'll miss this peace.
A.I'm the only woman in this group.
B.That was a very long time to live in space.
C.People often ask what food tastes like in space.
D.This stops everything floating away while we eat!
E.On the other hand, the ISS is a perfect environment to do scientific experiments.
F.That's the meeting where we discuss what needs to be done during the day.
G.They like my desserts, and they have a dark bread that I love.
H.I'll never forget looking through the window and seeing it for the first time.
第10题
The marvel of the machine age, the electronic computer has been in use only since 1946. It can do simple computations—add, subtract, multiply, and divide—with lightning speed and perfect accuracy. It can multiply two 10-digit numbers in 1/1, 000 second, a problem that would take an average person five minutes to do with pencil and paper. Some computers can work 500, 000 times faster than any person can.
Once it is given a program, that is, a carefully worked-out set of instructions devised by a technician trained in computer language, a computer can gather a wide range of information for many purposes. For the scientist it can get information from outer space or from the depths of the ocean. In business and industry the computer prepares factory inventories, keeps track of sales trends and production needs, mails dividend checks, and makes out company payrolls. It can keep bank accounts up to date and make out electric bills. If you are planning a trip by plane, the computer will find out what route to take and what space is available.
Why does the author regard the electronic computer as the marvel of the machine age？
A．Because electronic computers are rare.
B．Because people know little about electronic computers.
C．Because electronic computers can do much more kinds of work that human beings can't.
D．Because electronic computers have been widely suspected.
