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A．Completing an education.B．Supporting a family.C．Living independently of parents.D．Ma
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Groundbreaking research by two French geophysicists promises to shed some light on the mystery. Using 80 meters of deep sea sediment core, they have obtained measurements of magnetic-field intensity that span 11 polarity reversals and four million years. The analysis reveals that intensity appears to fluctuate with a clear, well-defined rhythm. Although the strength of the magnetic field varies irregularly during the shout term, there seems to be an inevitable long term decline preceding each polarity reversal. When the poles flip-a process that takes several hundred thousand years--the magnetic field rapidly regains its strength and the cycle is repeated.
The results have caused a stir among geophysicists. The magnetic field is thought to originate from molten iron in the outer core, 3,000 kilometers beneath the earth's surface. By studying mineral grains found in material ranging from rocks to clay articles, previous researchers have already been able to identify reversals dating back 170 million years, including the most recent switch 730, 000 years age. How and why they occur, however, has been widely debated. Several theories link polarity flips to external disasters such as meteor impacts. But Peter Olson, a geophysicist at the Johns Hopkins University in Baltimore, says this is unlikely if the French researchers are right. In fact, Olson says intensity that predictably declines from one reversal to the next contradicts 90 percent of the models currently under study. If the results prove to be valid, geophysicists will have a new theory to guide them in their quest to understand the earth's inner physics. It certainly points the direction for future research.
Which of the following titles in most appropriate to the passage？
Fear is often a useful emotion. When you become frightened, many physical changes occur within your body. Your heartbeat and responses quicken, your pupils expand to admit more light, large quantities of energy producing adrenaline(肾上腺素)are poured into your bloodstream. Confronted with a fli'e or accident, fear can fuel life-saving flight(逃离). Similarly, when a danger is psychological rather than physical, fear can force you to take self-protective measures. It is only when fear is disproportional to the danger at hand that is becomes a problem.
Some people are simply more vulnerable to fear than others. A visit to the newborn nursery of any large hospital will demonstrate that, from the moment of their births, a few fortunate infants respond calmly to sudden fear-producing situations such as a loudly slammed door. Yet a neighbor in the next bed may cry out with profound fright From birth, he or she is more prone to learn fearful responses because he or she has inherited a tendency to be more sensitive.
Further, psychologists know that our early experiences and relationships strongly shape and determine our later fears. A young man named Bill, for example, grew up with a father who regarded each adversity as a temporary obstacle to be overcome with imagination and courage. Using his father as a model, Bill came to welcome adventure and to trust his own ability to solve problems.
Phil's dad, however, spent most of his time trying to protect himself and his family. Afraid to risk the insecurity of a job change, he remained unhappy in one position. He avoided long vacations because "the car might break down." Growing up in such a home, Phil naturally learned to become fearful and tense.
In the last sentence of Paragraph 1, "our particular creature" refers to ______ .
M: Why don't you check back after the first week？ Somebody might drop it.
Q: What does the man suggest the woman do？
(18)
听力原文：W: I wish I didn't have to make a special trip to the post office to get my package.
M: Well, if you call them in the morning, they'll give the package to your mail carrier to bring out to you.
Q: What does the man suggest the woman do？
(16)
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