As in the field of space travel, new technologies continue to appear in undersea exploration. They share a number of similarities with each other — as well as some important differences.
Manned submersibles (潜水器), like spaceships, must maintain living conditions in an unnatural environment. While a spaceship must simply be sealed against the vacuum space, a submersible must be able to bear extreme pressure if it is not to break up in deep water.
In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other hand, men paved the way, and only recently have unmanned remote-operated vehicles (ROVs) been put to use.
One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater. A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles — particularly ROVs — operate at the end of long ropes.(电缆终端)
For a similar reason, knowing where you are undersea is much more difficult than in space. A spaceship’s position can be located by following its radio signal, or by using telescopes and radar. For an undersea vehicle, however, a special network of sonar （声纳系统）devices must be laid out in advance on the ocean floor in the area of a dive to locate the vehicle’s position.
Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity. Thus, it remains far less expensive.
1.The purpose of the passage is ______.
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A．to persuade you to explore the depths of the ocean |
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B．to stress the importance of the undersea exploration |
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C．to make you believe that the undersea exploration is better |
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D．to tell some differences between two kinds of explorations |
2. By saying “men paved the way” in Paragraph 2 the author means that in undersea exploration ______.
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A．unmanned vehicles were used in the beginning |
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B．men covered the ocean floor with stones and bricks |
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C．manned vehicles were employed before unmanned ones |
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D．men invented unmanned remote-operated vehicles in the past |
3.The sonar devices must be placed ______.
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A．from time to time |
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B．after the undersea vehicles dive |
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C．before the undersea vehicles dive |
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D．when the undersea vehicles are diving |
4.What can we infer from the passage?
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A．Submersibles usually break up in deep water. |
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B．Undersea vehicles can receive signals immediately. |
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C．Going to space needs power to escape the gravity. |
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D．Radio communications are quite difficult in a vacuum. |
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You will get:
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?Eight fluency-focused lessons on four audio CDs
?Audio instruction with a 25-year history of success
?Full 30-day money-back guarantee (just in case)
?Special offers on our more advanced courses
Reasons to learn using the Pimsleur Approach:
?Speak without an accent so that you sound like a native.
?Practice what’s natural to you in English.
?Feel safe and confident. You’ll know how to deal with any situation.
?Protect your busy life. 30-minute lessons are perfect for your daily commuting, lunch break, or workout.
?Remember without trying. Material is scientifically arranged so that you learn without pain.
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The entire Pimsleur Approach is what language learning should be: quick, fun, and easy! Each lesson is the foundation for the next. You’ll keep building on what you’ve learned.
1.What can prove Pimsleur courses to be successful ?
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A．Full 30-day money-back guarantee |
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B．Eight fluency-focused lessons on four audio CDs |
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C．25 million people have graduated with success . |
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D．30-minute lessons are perfect for your daily commuting, lunch break, or workout. |
2.According to the text, what does the course offer?
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A．Effective language instruction. |
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B．Language rules for you to recite. |
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C．Learning a new language by repeating many times |
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D．Opportunities to work with business professionals. |
3.According to the text, which of the following is NOT a reason for choosing the Pimsleur Approach?
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A．It will correct your accent. |
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B．It will build your confidence. |
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C．It will help you remember things easily. |
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D．It will teach you how to control your balance . |
4.It can be inferred that the text is a(n) __________.
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A．report on a new language learning method |
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B．ad of a language training organization |
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C．notice of the opening of a new course |
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D．comment on a language training organization |
Many people take it for granted that black is a color of bad things while white should always mean something good. This may be because, in their opinion, black is related to darkness and white to purity. However, that is not always the case. Did you know that the same one color may mean something differently in different places of the world?
In the English-speaking world, black is the color of mourning—people wear black at the funeral. Red is concerned with danger or bloodshed（伤亡）. Yellow is the word for fear. If you are afraid, you are yellow. Yet none of these sayings is true outside the English-speaking world. In China and Korea white is the color of mourning. In Russia, China and some other countries, red stands for beauty, life and excellence. In Italy and Germany, you are yellow with anger, not with fear.
Even within the English-speaking area, it is not difficult to find color contradictions（矛盾）.A redcap in the United States is a porter in a railway station. In Britain, however, a redcap is a military policeman. Both names are logical, because both men wear red caps. Similarly, the British term for an American white-collar worker is sometimes called a black-coated worker.
One does not have to cross an area to find color differences. Would you rather be red-blooded or a blue-blooded? If we go back to the origin, we find that both terms are logical as both names suggest. The expression “blueblood” comes from Spain, where some noble families proudly told the world that they had “blue blood”. Actually they meant that they had no Moorish or Jewish blood. But then why “blue” blood? Because they were fair-skinned, and it is only natural that their blood vessels (血管)stood out appearing blue.
1. Yellow is concerned with anger in ________________.
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A．India |
B．Britain |
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C．China |
D．Italy |
2.Both Britain and America would probably agree that ________________.
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A．a redcap is a porter in a station |
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B．black is the color of mourning |
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C．red stands for beauty and excellence |
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D．a black-coated worker is employed in an office |
3. In Britain , a redcap is a
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A．porter |
B．nobleman |
C．clerk |
D．military policeman |
4.The best title for this reading selection is ________________.
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A．The Origin of Blue Blood |
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B．Colors that Carry Bad Meanings |
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C．The Meaning Concerned with Certain Colors |
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D．The Development of the Symbolic Use of Colors |
阅读下面短文，从短文后各题所给的四个选项A、B、C和D中，选出空白处的最佳选项，并在答题卡上将该项涂黑。
Tips to keep a hearty conversation flowing
On holidays we typically gather with our nearest and dearest. But 36 can be made, maintained and broken through the ways we talk to our loved _37___, according to Deborah Tannen, a George-town University professor in linguistics（语言学）. She has suggestions as to how we can 38 communications at our festival dinner tables. Let’s take a look.
＊A round dinning table is best for promoting a 39 conversation because
everyone 40 each other.
＊Avoid _41_ grandparents at the ends of a rectangular(长方形的) table, even though it is the traditional place of __42__. Elderly people may feel lonely there if they are unable to hear or keep __43__ a conversation.
＊__44__ prefer to face each other and make eye contact when they talk. In contrast, men tend to look around at other things. “Guys may be more 45 keeping gazing on the TV,” says Tannen. “They’ll still be _46__, though.”
＊Be aware that people have different ways of talking. Each person has a different __47__ of tone, rhyme, timing and how _48__ of a pause is normal in a conversation. Watch for people who seem left __49__. If you feel you are doing all the talking, hold back to give others a 50 .If you feel you aren’t getting a chance to speak, try pushing yourself to start 51 .
＊People sometimes get upset on big festivals _52 they stay too long in the apartment. Some families find that gatherings go more __53__ if they plan for some fun _54___. So why not get a breath of fresh air? Going to a park for a walk or taking a trip to the zoo may be more__55__ than just sitting around inside.
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In order to reduce the increasing prices of vegetables , the toll(过路费) if a truck carrying them passes through a toll station .
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A．cancels |
B．is cancelled |
C．was cancelled |
D．had been cancelled |
——It was the drug，not the disease，that killed the boy.
——He would be still alive today if he ________ that drug.
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A．not take |
B．shouldn’t have taken |
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C．didn’t take |
D．hadn’t taken |
