[填空题]Consumers have become less interested in 3D TV at home, partly because of (have)________ to wear special glasses.

[填空题]Consumers have become less interested in 3D TV at home, partly because of (have)（）to wear special glasses.

[简答题]Schools have become less important and long-term health care more important as America becomes a society with fewer children and more old people.

[填空题]To make fears become a less serious problem for children, it is important to help them gain ______.

[单项选择]They usually have less money at the end nf the month than（）at the beginning.
A. which
B. which was
C. they have
D. it is

[填空题]Before the rise of industry people have less ______ since they had to work from dawn to dark with little time allowed for meals.

[单项选择]As people age, their cells become less efficient and less able replace damaged components. At the same time their tissues stiffen, For example the lungs and the heart muscle expand less successfully, the blood vessels become increasingly rigid, and the ligaments and tendons tighten.
Few investigators would attribute such diverse effects to a single cause. Nevertheless, researchers have discovered that a process long known to discolor and toughen foods may also contribute to age-related impairment of both cells and tissues. That process is nonenzymatic glycosylation, whereby glucose becomes attached to proteins without the aid of enzymes. When enzymes attach glucose to proteins (enzymatic glycosylation), they do so at a specific site on a specific protein molecule for a specific purpose. In contrast, the nonenzymatic process adds glucose haphazardly to any of several sites along any available peptide chain within a protein molecule.
This nonenzymatic glyeosylation of certain p
A. It paradoxically both helps and hinders the longevity of proteins in the human body.
B. It can be counteracted in part by increased ingestion of glucose-free foods.
C. It is exacerbated by increased enzymatic glycosylation.
D. It probably involves the nonenzymatic glycosylation of proteins.

[单项选择]Guitar strings often go "dead"—become less responsive and bright in tone—after a few weeks of intense use. A researcher whose son is a classical guitarist hypothesized that dirt and oil, rather than changes in the material properties of the string, were responsible.
Which of the following investigations is most likely to yield significant information that would help to evaluate the researcher’s hypothesis
A. Determining if a metal alloy is used to make the strings used by classical guitarists.
B. Detennining whether classical guitarists make their strings go dead faster than do folk guitarists.
C. Detennining whether identical lengths of string, of the same gauge, go dead at different rates when strung on various brands of guitars.
D. Determining whether a dead string and a new string produce different qualities of sound.
E. (E) Determining whether smearing various substances on new guitar strings causes them to go dead.

[单项选择]Ted: Do you have to have that TV on quite so loud Paul: ________, is it bothering you
A. Yes, I have to
B. I’m sorry
C. Yes, enjoy yourself
D. Excuse me

[单项选择]More than 80 percent of US adults have a less than 10 - percent risk of developing heart disease in the next 10 years, according to a report in the Journal of the American College of Cardiology. Just 3 percent have a risk that exceeds 20 percent.
Only 3 percent of US adults have a more than 10 percent 10 year risk of heart disease.
A. Right
B. Wrong
C. Not mentioned

[填空题]International economic links have become tighter and tighter,__________________________. (正对世界经济、经济、和社会的发展产生着重要影响)

[单项选择]

You might think they would have learned their lesson by now. At the end of 2005 Republicans in the House of Representatives passed a bill that cracked down on illegal immigration, while doing nothing to regularise the position of the 12m or so people, mostly of Hispanic origin, who were living and working inside the United States without the proper papers, or to create a mechanism for allowing in people from Mexico and other southern neighbours to work with temporary permits. The bill never became law, but its one-sided nature helped stamp the Republicans (92% of whom voted for it in the House) as an anti-immigrant party. In April 2006 Latinos organised a day of protests in more than 100 cities; more than 500,000 people marched in Los Angeles alone. In the 2008 election 67% of Hispanics voted for Barack Obama.
Now it is all happening again. Until now, the detection of illegal immigrants has invariably been a matter for the federal authorities.
Republican-governed
A. Many white people in Arizona welcome the Republicans’ bill.
B. Hispanic may be the largest minority group in Arizona.
C. Immigrants will outnumber white people in the U. S.
D. John McCain supports the bill due to his political standpoint.