[填空题]

Can Digital Textbooks Truly Replace the Print Kind
A．The shortcomings of traditional print edition textbooks are obvious: For starters they’re heavy, with the average physics textbook weighing 3.6 pounds. They’re also expensive, especially when you factor in the average college student’s limited budget, typically costing hundreds of dollars every semester. But the worst part is that print versions of textbooks are constantly undergoing revisions. Many professors require that their students use only the latest versions in the classroom, essentially rendering older texts unusable. For students, it means they’re basically stuck with a four pound paperweight that they can’t sell back.
B．Which is why digital textbooks, if they live up to their promise, could help ease many of these shortcomings. But till now, they’ve been something like a mirage (幻影) in the distance, more like a hazy (模糊的) dream tha

[填空题]

Can Digital Textbooks Truly Replace the Print Kind
A．The shortcomings of traditional print edition textbooks are obvious: For starters they’re heavy, with the average physics textbook weighing 3.6 pounds. They’re also expensive, especially when you factor in the average college student’s limited budget, typically costing hundreds of dollars every semester. But the worst part is that print versions of textbooks are constantly undergoing revisions. Many professors require that their students use only the latest versions in the classroom, essentially rendering older texts unusable. For students, it means they’re basically stuck with a four pound paperweight that they can’t sell back.
B．Which is why digital textbooks, if they live up to their promise, could help ease many of these shortcomings. But till now, they’ve been something like a mirage (幻影) in the distance, more like a hazy (模糊的) dream tha

[填空题]If we truly believe we can win, then we have a very good chance at doing it.

[填空题]To speak truly, few adult persons can see nature. Most persons do not see the sun. At least they have a very superficial seeing. The sun illuminates only the eye of the man, but shines into the eye and the heart of the child. The lover of nature is he whose inward and outward senses are still truly adjusted to each other, who has retained the spirit of infancy even into the era of manhood. His intercourse with heaven and earth becomes part of his daily food. In the presence of nature a wild delight runs through the man, in spite of real sorrows. Nature says: He is my creature, and maugre all his impertinent griefs, he shall be glad with me. Not the sun or the summer alone, but every hour and season yields its tribute of delight ; for every hour and change corresponds to and authorizes a different state of the mind, from breathless noon to grimmest midnight. Nature is a setting that fits equally well a comic or a mourning piece. In good health, the air is a cordial of incredible virtue.

[单项选择]
Most older people with so-called type II diabetes could stop taking insulin if they would do brisk exercise for 30 minutes just three times a week, according to new medical research results reported in the Copenhagen newspaper Berlingske Tidende on Monday.
Results from tests conducted on diabetics at the Copenhagen Central Hospital Rigshospitalet’s Center for Muscle Research showed that physical exercise can boost the body’s ability to utilize insulin by 30 percent, the newspaper reported.
This is equal tol the effect most elderly diabetics get from their insulin medication today, it said.
Researchers had a group of non-diabetic men and a group of men with type It ,all more than 60 years of age, exercise on bicycles six times a week for three months. After the three months the doctors measured how much sugar the test subjects’ muscles could utilize as a measure for howwell
A. To the degree where they begin to sweat.
B. To the degree where they feel exhausted.
C. To the point when they feel thirsty.
D. To the point when they have to take insulin.