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【单选题】
The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise. Millions of individuals became (1) in a variety of aerobic activities, and (2) thousands of health spas (3) around the country to capitalize on this (4) interest in fitness, particularly aerobic dancing for females. A number of fitness spas existed (5) to this aerobic fitness movement, even a national chain with spas in most major cities. However, their (6) was not on aerobics, (7) on weight-training programs de signed to develop muscular mass, (8) , and endurance in their primarily male (9) These fitness spas did not seem to benefit (10) from the aerobic fitness movement to bet ter health, since medical opinion suggested that weight-training programs (11) few, if (12) , health benefits. In recent years, however, weight training has again become in creasingly (13) for males and for females. Many (14) programs focus not only on devel oping muscular strength and endurance but on aerobic fitness as well. (15) , most physi cal-fitness tests have usually included measures of muscular strength and endurance, not for health-related reasons, but primarily (16) such fitness components have been related to (17) in athletics. (18) , in recent years, evidence has shown that training programs designed primarily to improve muscular strength and endurance might also offer some health (19) as well. The American College of Sports Medicine now (20) that weight training be part of a total fitness program for healthy Americans.
A.
practitioners
B.
enthusiasts
C.
referees
D.
recipients
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【单选题】3 The early retirement of experienced workers is seriously harming the U. S. economy, according to a new report from the Hudson Institute, a public policy research organization. Currently, many older ...
A.
there will be an acute labor shortage in the near future
B.
baby-boomers contribute much to the US economic output
C.
government policies concerning older people are out-dated
D.
older workers are enthusiastic about collecting social benefits
【单选题】1 What our society suffers from most today is the absence of consensus about what it and life in it ought to be; such consensus cannot be gained from society’s present stage, or from fantasies about w...
A.
the non-existence of consensus on the forms the society should take
B.
the lack of divergence over the common organizations of social life
C.
the non-acceptance of a society based on individual diversity
D.
the pervasive distress caused by national morale decline
【单选题】The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise. Millions of individuals became (1) in a variety of aerobic activities, and (2) thousands of health ...
A.
because
B.
if only
C.
although
D.
now that
【单选题】It is indicated in Paragraph 2 that（） A. we cannot find enough advice about jet lag B. people often talk about drugs for jet lag C. Nuvigil is the best drug for jet lag D. if you sleep too much after ...
A.
Jet lag is back on the agenda for business travelers, especially as long-haul international traffic picks up again.
B.
There is endless advice online about jet lag. Drugs are frequently mentioned, and a recent favorite is Nuvigil, used to treat excessive sleepiness. Nuvigil’s manufacturer, Cephablon, has so far not succeeded in obtaining government approval for its plan to market the drug as a remedy forjet lag.
C.
But the approach I hear most often from long-haul travelers involves diet and preparation. " Why would you take a pill that your body then has to shake off " said Lynne Waller Scanlon, the author, with Charles F. Ehret, of Overcoming Jet Lag, which was a best seller in the mid-1980s but went out of print until she revised and republished it last year under a snappier title, The Cure for Jet Lag.
D.
The book lays out a treatment system for jet lag based on pre-trip diet and conditioning to reset the body’s internal clock. The book suggests resetting the body clock so that it will be in sync with the time at the destination. One to three days before a trip, the authors suggest low-calorie meals. In flight, avoid or strictly limit alcohol, and use coffee or tea to persuade the body clock that it’s daytime. If it’s morning after flying all night, resist sleep and " flood your eyes with daylight " , they suggest.
E.
While all long-haul travel can cause normal fatigue, travel across time zones causes the body to react with the most pronounced effects of jet lag, including disorientation and a general sense of discomfort.
F.
In the last few years, the global airlines have put more emphasis on accommodating the need for in-flight sleep—at least in the business and first—class cabins, where international airlines earn most of their revenue. But at the same time, international airlines also promote extensive in-flight entertainment selections, as well as high-end menus, including quality wine lists, in premium classes. Indulging in these would seem to work against dietary treatment to combat jet lag. But Ms. Scanlon says recovery is nevertheless attainable.
G.
" What do you do if you can’t implement this program ahead of the trip, or if you’ve blown it and had a complete debauch on the plane " she said, " Well, when you get off that plane, you get on the program right away. It may not be perfect, but you will feel much, much better.
【单选题】The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise. Millions of individuals became (1) in a variety of aerobic activities, and (2) thousands of health ...
A.
or
B.
or else
C.
and
D.
but rather
【单选题】The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise. Millions of individuals became (1) in a variety of aerobic activities, and (2) thousands of health ...
A.
presented
B.
offered
C.
indicated
D.
demonstrated
【单选题】The aim of "Noah’s Ark" project is to（） A. implant embryo into a host animal B. salute the Chinese efforts in saving pandas C. save endangered animals from extinction D. introduce cells from a dead fe...
A.
With only about 1,000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species. That’s a move similar to what a Texas A＆M University researcher has been undertaking for the past five years in a project called "Noah’s Ark".
B.
Dr. Duane Kraemer, a professor in Texas A＆M’s College of Veterinary Medicine and a pioneer in embryo transfer work and related procedures, says he salutes the Chinese effort and "I wish them all the best success possible. It’s a worthwhile project, certainly not an easy one, and it’s very much like what we’re attempting here at Texas A＆M—to save animals from extinction. "
C.
Noah’s Ark is aimed at collecting eggs, embryos, semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Kraemer says there would be enough of the basic building blocks to reintroduce the species in the future.
D.
It is estimated that as many as 2,000 species of mammals, birds and reptiles will become extinct over the next 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
E.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.
F.
The entire procedure could take from three to five years to complete.
G.
"The nuclear transfer of one species to another is not easy, and the lack of available panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy. It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort , "adds Kraemer, who is one of the leaders of the Missyplicity Project at Texas A＆M, the first-ever attempt at cloning a dog.
H.
"They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly applaud their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.